I can give you these quick tips for finding the right sprites. I don't have a ton of time to assemble tiles right this second.
If you need anymore help, feel free to ask.
- Offset is 10
- Characters start at "000F5C"
- Saving the OBJ palette when Shendu is on screen in game would make searching a lot easier (Correct palette is necessary, anyway)
- If you're not using it already, Tile Molester Alternate supports GBA palettes
If you need anymore help, feel free to ask.