For those wondering how I ripped this:
The Torus GBA games use the same engine as their Leapster games and even have the same decompression functions. Using this knowledge, I was able to inject some asset data into a GBA ROM (Shrek Smash n' Crash Racing in this case), do a bit of research to find where it gets loaded into memory and grab the map data (which gets stored in EWRAM as 2 parts - the block map and the background map). For the tiles, I just saved PALRAM and VRAM to a file. The compression algorithm appears to be unique to the Torus Games game engine, so it needs to be reverse engineered to rip stuff without these workarounds.