tuipet
▶ Play in your browser: ff3mmo.com/tuipet — no install, same online lobby as the terminal game.
A terminal virtual pet — Digimon V-Pet style — rendered with halfblock Unicode sprites and animated in the terminal. It builds on the work of the Digimon V-Pet fan community — see Credits & acknowledgments.
Status: live and actively developed — see the changelog for what each release brought. tuipet is its own game: the core V-Pet behaviour draws on documented device evolution charts and community references, with tuipet's own care, combat, economy and progression rules. Regular updates ship as the game grows.
What's inside
- NEW in 0.6 — the Godzilla line. The full Digital Monster COLOR Godzilla 70th Edition chart: 28 new kaiju, from Botamon G and Baby Godzilla up through SpaceGodzilla, Kiryu, Destoroyah and Godzilla 1994 to Burning Godzilla, plus the G-Erosion forms of MetalGreymon, SkullGreymon and WarGreymon, each firing its own shot in battle. Clear the Monster Island road to earn the Godzilla Egg; the device's G-Cell meter decides which kaiju your pet becomes, and a G-Cell Fragment left where a G-Erosion kaiju falls is the only road to Burning Godzilla.
- 1,584 creature entries, 11 animation frames each, extracted from the game's
sprite atlases as 1-bit bitmaps (
src/tuipet/data/sprites.json.gz). - A basic V-Pet with care (hunger, effort, filth, sleep, lights), training drills, evolution (care-quality gates + DNA divergence + armor Digimentals + jogress), an Adventure mode (30 maps, bosses, towns), raid bosses, cups on a real-calendar schedule (seasons, weekends, holidays), a home shop with a three-tab storefront, digitama earned by play (and bought outright in each town's own egg shop), an in-game AI care assistant, and the device's own screen transitions and animation timelines.
- Online play tuipet adds on top: free accounts whose save lives in the cloud — one pet, on one device at a time, the way a cartridge works — and a live lobby with chat, PvP battles, and two-player jogress fusion.
- A
rich/textualUI: a fixed LCD arena with the animated pet, a live status card, and a one-line control strip — every screen lives in the box.
Install
Requires Python 3.10+.
One command:
pip install tuipet && tuipet
Or with pipx / uv (isolated):
pipx install tuipet # then: tuipet
uvx tuipet # run without installing
Every sprite, sound, and CSV is bundled in the package — nothing else to download.
On Termux (Android): first pkg install python, then pip install tuipet. To
actually hear the LCD beeps you also need the termux-api package
(pkg install termux-api) and the Termux:API app from F-Droid/Play — the
package alone isn't enough: it installs a bridge that only works when the app
is there. Missing the app, tuipet detects that and falls back to the terminal
bell (Options → sound then reads bell only), so a silent install tells you
what's wrong instead of just being quiet. Over SSH, tuipet avoids audio playback on the server and falls back to the
terminal bell. The
curl -fsSL https://raw.githubusercontent.com/joeltco/tuipet/main/install.sh | bash
script installs Python, tuipet and the termux-api package in one shot;
it still asks you to install the Termux:API app separately.
On iPhone / iPad — use a-Shell (the supported iOS way): a-Shell is a free, open-source terminal on the App Store that ships Python. tuipet requires Python 3.10 or newer.
pip install tuipet
python3 -m tuipet
Use python3 -m tuipet rather than the bare tuipet command: a-Shell installs
console scripts somewhere PATH doesn't always look, and the module launch
always works. Tap the ⌨ key row above the keyboard for Esc and the arrow
keys. Turn your phone to landscape (or drop the font size in a-Shell's settings)
if the panels wrap.
Two iOS notes, both handled for you:
- Saves. iOS forbids writing to
~, so tuipet keeps your pet in~/Documents/tuipet/there instead of the usual~/.local/share/tuipet/. That folder is visible in the Files app, so your pet is backup-able and AirDrop-able. SetTUIPET_SAVE_DIRto put it anywhere you like. - Sound. iOS sandboxes audio players, so tuipet falls back to the terminal bell (Options → sound shows bell only). Everything else — the lobby, battles, jogress, raids — works exactly as it does everywhere else.
On iSH: check that its Alpine Python is 3.10 or newer before running
pip install tuipet. Older Python versions cannot install tuipet. Prefer
a-Shell above — it's the smoother iOS experience.
Run from source
python -m venv .venv && . .venv/bin/activate
pip install -e .
tuipet # or: PYTHONPATH=src python -m tuipet.app
Start from an egg — real dot-matrix egg designs; it wobbles, cracks, and hatches.
The egg guide shows unlock goals; the carousel shows only eggs you can hatch. Earned permanent eggs stay available, while lineage eggs last only while their previous-generation condition holds. Towns also sell permanent egg shortcuts for 10,000 bits, limited to one purchase per real day across towns.
Death or retirement starts the next generation. Bits, inventory, trophies, qualifier records and banked DNA carry over; body stats, injuries, fight records and applied DNA reset. Unused DigiMemory carries as one payload and one chip. At death, etching spends the care bonus; declining carries the adjusted bonus. Re-picking an unhatched egg keeps its generation and inheritance. An unhatched Godzilla egg's fragment waits again if you choose another egg, until you pick Godzilla Egg. The album remembers species; the Hall remembers the latest 30 departed or retired partners.
Keys
The action bar reads in the in-game Help screen's order — care, then explore, then grow, then manage:
| key | screen | key | screen |
|---|---|---|---|
| f | feed | x | DNA |
| h | heal an injury | d | DigiCore |
| c | clean | e | digitama guide |
| o | lights | s | shop |
| v | AI assistant | b | bag |
| m | battle | n | scenes |
| a | adventure | g | options |
| r | raid | i | bug report |
| u | tournament cup | ? | help |
| l | online lobby | q | quit |
| t | train | ENTER | accept a found gift |
| p | discipline (praise·scold) |
SPACE doubles ENTER on most screens; DigiCore uses it for gaze/page, and the road distinguishes walking on from entering or digging. PageUp/PageDown leap through supported long lists. ESC returns from a screen.
m is the battle key: a real recorded bout against a rival of your pet's own stage, right at home — no purse, and each bout spends energy, so the tank paces the fighting. Beyond it, PvE combat happens in adventure, raids and cups; PvP battles and fusion happen in the lobby.
Care & evolution
Evolution follows the egg's lines.csv chart: ordered care and battle
brackets pick the first matching route, with a stage roll sharing qualifying
shadowed routes. Off-chart forms use digimon.csv care mistakes,
overfeed, sleep disturbances, weight class, battles/wins
and generation gates, fulfilled-requirement scoring and deviation
tiebreak. Per-stage counters
reset on evolution; power and battle records carry for life. Good care with
focused training walks the classic lines; neglect finds Numemon.
Battle-gated Champions and above need local fights — home battles, adventure and cups feed the battle record. Lobby duels and raid volleys bill the body without feeding that record; defeated raid claims separately count Mega kills.
Training (t) is the timing drill: stop the sweep on the beat to land
the hit — every attempt grows effort and training, and saves its strike grade.
Local battle wins grow power in the defeated foe's attribute.
Battles resolve as the device's HP race.
Armor evolution: town shops' Crests tabs sell the 11 crest Digimentals in their canonical discovery waves — Courage and Hope from day one, the crest five after your first armor evolution, Light and Kindness at 25 wins, Miracles behind the raid bosses, Destiny at generation 5. All 73 armor forms are crest-exclusive, and the shop dossier names the form your pet would become right now.
DNA (x) is the per-Field collectible layer: charge banked Field-DNA
into the pet, or generate more with a 10-second SPACE exercise. A unique
leading Field at its stage threshold arms a divergence when that form
has a road in the Field; ties disarm it. The next growth uses that road
instead of the egg chart. Divergence lists every road destination; the final
choice uses care scores and chance. Charges clear at every evolution;
banked DNA stays. Charging costs energy (double off-Field), adds Effort up
to three hearts, and refuses a charge the pet cannot afford. Charged-share
conditions are selection bonuses for off-chart forms, not unlock gates.
DigiCore shows evolution requirements and your collection. Jogress (two-player DNA fusion) happens in the
lobby with a real partner — exact partner species or matching attributes
open the chart's fusion doors; off-chart pairings use the game's
attributeJogress matrix.
DigiCore (d) is tuipet's data book: the field-flavoured core counts down
toward the hatch/growth window, then counts age toward elderhood. Growth
still needs its gates and an awake, unblocked pet. SPACE on CORE shows a
silhouette of a potential next form; other pages use SPACE to advance.
EVOLVES lists every chart route: ENTER opens its requirements, including
incubation and lobby partners. TROPHIES keeps inherited wins and distinct
career cups; ENTER opens the album, or the hall of memory on LEGACY.
Raids & cups
Press r for raids: boss fights against the world's heavies, with a shared community pool that sizes itself to the crowd — a small crew can fell its boss, and each kill grows the next one up to the pool cap. Three volleys a day, each billing energy and a little weight like any other fight. A felled boss collapses on the arena before the next one takes the stage, and your share waits on the board until you press C to claim it — your pet steps out to celebrate while the prize line names every bit and item. Each felled boss counts toward egg unlocks and the Miracles Digimental wave; even an escaped boss pays out by your share of the damage.
Press u for the cup page, which runs on the real calendar: seasonal cup pools, a featured cup picked by the date (the weekend headliner is one your pet's own bracket can win), and holiday specials — including Odaiba Memorial Day on August 1. A grand-final chain that crosses real seasons tells you which season's qualifier you're missing. Each cup is the 8-entrant single-elimination bracket (Quarterfinal → Semifinal → Final) with real rolled entrants; the other pairs auto-resolve between your rounds. Titles pay the canonical purse, count trophies, and gate tournament egg unlocks. An alarm can call you when a cup you care about opens.
Each entry spends a stake and its hourly slot (all unrun slots open on festival days); the featured cup runs once per real day. A quarterfinal exit pays nothing, a semifinal loss one third of the purse, and a final loss half. A title defense pays 1.5× the purse, and weekend payouts also receive 1.5×.
Online
Press l for the lobby (accounts are free — pick a name and password). Live chat with backlog, presence, private messages (threads keep their scrollable history — up to 200 live messages per thread, with the latest 50 kept between sessions), PvP battles (seeded on both peers, with the full round-replay animation), and two-player jogress fusion. TAB opens the monthly ladder — online wins race a fresh season each month, and past-season podium finishers claim a bits award, confirmed by the server and paid out in a full award ceremony under the arena lights. Password rooms give you a private scope: everyone who types the same phrase lands in the same room, chat and roster included.
Your save lives in the cloud on your account, and it behaves like a cartridge: the pet is checked out to exactly one device at a time. Open tuipet somewhere else and it asks before touching anything — "Your pet is on phone. Take it onto this device?" — and only a yes moves it. The device holding the pet is never prompted and plays exactly as before; no other device can write over your save, however fresh its clock claims to be. Offline play stays local on the holding device. A cached non-holding device that cannot reach the cloud must reconnect before taking the pet.
Scenes
Press n to change the backdrop — real ripped scenes, and each egg comes wired to its own home scene, so the digitama you choose decides the view your pet grows up with (until you repaint it).
Shop, bag & economy
s opens the home storefront — [Food] Items Honors — stocked with the TUIPET catalog: real foods that get eaten on the LCD through their own device art (fish, steak, a feast, one mushroom you should NOT feed), care goods and growth tools, and toys that actually play — the ball bounces, the skateboard rides, the TV glows — each nudging a real meter (exercise sheds weight, couch time builds DP for fusion). Every item wears its own device sprite, and the live dossier shows the effect, a word of character, what you already hold, and (for a crest egg) the armor form it would trigger right now. b is the bag: use with ENTER, sell back for half with R. Birthdays hand out treats you can actually eat. The Honors board sells cosmetic tamer titles for the truly rich.
Digitama are earned by playing — reaching stages, felling raid bosses, winning cups, clearing adventure maps, celebrating festivals, growing your album — exactly like the real devices; the carousel shows only what you can hatch and teases the one you're closest to earning, and a newly earned digitama announces itself by name when you get home (e opens the guide). On the road, each town's egg shop also sells a distinct band of eggs outright — the real 8×8 egg sprites, a paid shortcut that drops straight onto your carousel, and no two towns stock the same band of eggs.
AI assistant & options
v hires the device's auto-care AI (a game-hour retainer and per-care fees, both scaled by stage — it minds the pet, at a price). g opens options: account switching, sound backend, updates, key reference, theme, and the new-game/erase controls.
Updating
tuipet updates itself. On launch it checks PyPI in the background, installs any newer release, and tells you to restart to play it — the running process keeps the version it started with, so the new one comes up next time.
Prefer to do it yourself? Press a on the options → Update row to switch auto-update off; you'll still be told when a release is out. You can also press ENTER there to check now, and ENTER again to install on the spot.
Where tuipet can't run pip for you — iOS sandboxes subprocesses, and a source run without installed package metadata has no release to install over — it hands you the command instead of pretending it updated.
Saving
Automatic — local save every 10 seconds and on quit, with backup generation. With an account, that save syncs to the cloud in the background from whichever device currently holds the pet (see Online); any local save that a cloud pull replaces is snapshotted first, so a wrong answer is undoable.
A closed game is a stopped clock. Nothing happens while you're away: your pet doesn't age, grow, incubate, get hungry, or make a mess. Quit for five minutes or five months and you reopen to exactly the pet you left. Time passes only while you're actually playing — and only on the main view, since every menu pauses the sim too.
Asset pipeline
Raw game files live under _extract/ (gitignored). Re-extract with:
python tools/extract_sprites.py # rebuilds src/tuipet/data/sprites.json.gz, eggs and icons
This extraction overwrites the curated egg bank as well as the sprite bank.
The raw inputs are raw_resources/ and raw_model/, linked to _extract/
by tools/setup_assets.sh.
The atlases are 672×672, an 11×11 grid: each column is one creature, each of the 11 rows is an animation frame. Creatures are authored at 3× scale on a cyan LCD background; the extractor box-downsamples 3× (recovering native 16px sprites and dropping the dev-build column labels) and thresholds to 1-bit.
Sprite frame convention
Each creature's 11-frame strip uses a fixed pose order, reverse-engineered from
the game's own View/SpriteAnim.class (cfr-decompiled). Animations in
src/tuipet/data_core.py::ROLES mirror the game's cheer/jeer/eat/idleSleep/etc.
| idx | pose | used by |
|---|---|---|
| 0 | idle / walk A | idle bob (0,1), walk |
| 1 | idle / walk B | idle bob, play, wake |
| 2 | sleep / rest A | idleSleep (2,3), wake stretch |
| 3 | sleep / stretch | idleSleep, wake |
| 4 | refuse / cheer-down / clean | refuse head-shake, wash, poop |
| 5 | happy / cheer-up | cheer (good), play |
| 6 | attack / cheer-up | attack, mild jeer |
| 7 | eat-closed (chew) / cheer-down | eat (8↔7), heal, cheer |
| 8 | eat-open (mouth) / neutral | eat, heal, default expression |
| 9 | sad / tired / disliked | jeer, tantrum, fatigue idle |
| 10 | exhausted / collapse | jeer, tantrum, dying |
refuse is drawn as a left/right mirror flip on alternating frames (head-shake).
License
tuipet is open source, under the MIT License.
You can use it, read it, change it, fork it, publish your own version, or build something commercial on top of it. You don't need to ask permission, and you don't owe anyone anything for it. The MIT license asks that the copyright and permission notices travel with copies or substantial portions of the code.
Pull requests and forks are welcome — see the source layout in Run from source.
One scoping note, because it isn't ours to give away: the MIT license covers tuipet's code. It does not cover the Digimon sprites and game data, which are © Bandai and derived from DVPet — the bundled assets remain the property of their respective owners and are not covered by the code's MIT license. The Asset pipeline describes regenerating source assets from your own copy of DVPet. Details in NOTICE.
Credits & acknowledgments
tuipet stands on the shoulders of the Digimon V-Pet fan community — a whole ecosystem of hobbyists who reverse-engineered, documented, and preserved these devices. It draws on the work of many of them, including:
- DVPet by theundersigned — tuipet began as a study of this fan game, and its sprite bank and early data came from it.
- humulos.com/digimon — device evolution, egg, and roster documentation used to build and verify the lines.
- MultiVPet and Digimon Unlimited — community sprite/stat extractions cross-referenced during development.
- the wider V-Pet preservation scene whose archives made any of this possible.
Sincere thanks to every one of these creators and archivists — none of this would exist without your work.
The Digimon franchise and all creature names, designs, and sprites are © Bandai. tuipet is a non-commercial fan project, not affiliated with or endorsed by Bandai or any project listed above.
Are you one of these creators? If you'd like different credit, a link added, or your work removed, open an issue (or reach me) and I'll take care of it right away — no hard feelings.
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Metadata
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Release files for tuipet 0.6.52
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