A whole adventure on one tiny cartridge.

Joshémon is a monster-collecting RPG written in C for the Game Boy Advance. Catch 105 creatures, beat eight gyms and the league, and wake three legends.

Free. 1.9 MB. Plays in mGBA, or on a real GBA with a flash cart.

Play it here

The game runs in an open-source emulator (EmulatorJS) that loads only when you press play. Your save stays in this browser. Arrow keys move. Keyboard and gamepad buttons are in the player's controls menu.

Thirty seconds of it

Screens

The DUNE ROAD, a desert north of ROUTE 3 LEADER REED wants to battle Surfing across FROZEN BAY A wild CAELITH appears FROSTGATE in the snow MAYA, your rival, wants a battle The ASH CIRCLE in the SUNKEN SHRINE COVEWICK TOWN at the end of the SEAWALK

What's on the cartridge

105 creatures, all new

Every creature, every town and every melody is our own. There are three legends on top of the 105.

A full journey

Eight gyms, a rival, the ASH CIRCLE, VICTORY ROAD, the ELITE FOUR, a champion and a HALL OF FAME.

After the credits

Hunt the third legend, explore the CEDAR COAST and the ELDER GROTTO, run up a streak in the BATTLE HALL, and fill the DEX to earn the diploma.

The real Gen 3 rules

Damage, catching, EXP, status and evolution are worked out the way the 2003 games did them.

A world to explore

SURF, the BIKE, fishing, CUT trees, STRENGTH boulders, dark caves, ice floors that slide, a desert with sandstone ruins, and FLY.

Its own soundtrack

35 songs on the GBA's four sound channels, with sampled brass, strings and drums.

How to play

  1. Download joshemon.gba.
  2. Open it in mGBA on a Mac, PC or phone, or copy it to a flash cart for a real Game Boy Advance.
  3. Press START. Your game saves to the cartridge.