Jazz Jackrabbit for the Gameboy Advance (JJA) has a multiplayer feature, which features a number of levels.
There are two modes for playing multiplayer: single pak, in which only one cartridge is required, and multi pak, in which every player needs a game cartridge.
The game comes with 4 levels for the single pak multiplayer mode, which can also be played in multi pak mode, of which the last 2 need to be unlocked by playing through the single player mode.
The multi pak mode has 7 more levels, 3 of which need to be unlocked as well, but these are just some of the regular single player levels with the enemies removed and pickups placed around the levels.
This pack contains the 4 single pak levels that come with the game. I have not converted the 7 multi pak levels at this moment, since the single pak levels are the only levels that were strictly designed to be multiplayer levels.
The tiles for JJA work differently than the Jazz Jackrabbit 2 ones. They seem to be 8×8 pixels, while the ones for JJ2 are 32×32 pixels.
For this reason, the tiles can not be mapped to a tileset easily, without having them be out of proportion.
To fix this issue, I have simply drawn out the complete levels, by taking lots of screenshots, and then cutting them up and pasting them into the tilesets.
This way, there are a lot of duplicate tiles, but at least every platform is exactly where it is in JJA.
The backgrounds are basically the same as they are in JJA. The only difference here is that I have added some spacing between the sky and the ground part of the backgrounds.
Since the resolution of the GBA is much smaller, the backgrounds fit nicely on the screen, but this didn't really work in JJ2.
The starting positions are exactly as they are in JJA. Each level has 4 multiplayer start positions, corresponding with the 4 players available in JJA.
The JJA pickups have been replaced with JJ2 ones, but remain in the same spots as they are in JJA. Since the weapons for JJA don't exist in JJ2, I have changed them to the most similar weapon:
- The uzi is a fast fire upgrade
- The flamethrower is toaster ammo
- The rocket launcher is RF missile ammo
- The big gun is electroblaster ammo
- The carrot grenade is TNT ammo
Just like in JJA, the ammo respawns every 10 seconds, while health pickups respawn every 15 seconds.
The multiplayer mode in JJA has no music, so I have added some of the songs from the game myself.
The first 2 levels use the Carrotopolis music (the store), while the last 2 levels use the Pollutus levels music, since it uses some of the tiles from those levels.
I have tried to remain as true to the source as possible while recreating these levels. I hope you enjoy them!
Battle, by 
