Several Sonic Heroes Xbox demo level .bsp models don't have full texture mapping. Can convert several of them to .obj (Like the test level ones) with bsp2objv021sonic.exe.
Can't seem to get stg07 (Rail Canyon) .bsps to convert no matter what settings are used. =~.~=
Stg08 (Bullet Station) do convert for the most part. STG08_ONS_05.BSP won't convert.
Several of them don't have textures for the meshes, but do have texture mapping.