The graphics are 3D, yes, but the gameplay is decidedly 2D. The only thing that might not translate well to the GBA is the characters. When using zoom or slow-mo, the detail in characters is apparent on the GC version. To recreate that on the GBA, you'd either need several prerendered frames, or cel-shaded characters, which haven't been done on the GBA, especially at that size.
VJ on GBA is a definite possibility though.