Figured out Sonic Heroes PC broken stg00.txd. It's only partial at 217 KB. The Gamecube one is 2.25 MB. The PC one doesn't have any level textures, but hud/ui textures. The texture format for the 10 textures is r8g8b8a8 unorm. Some of the textures are miss named.

The most notable textures are the three early formation icons. They don't have character level indicator(0-3).

??? (I named it "4e")
st_st
st_num03
st_num01
st_mks
st_mkp
st_mkf
stg_03b
stg_03a
stg_01c
stg_01b
stg_01a (no data)

Oops, 12 textures. Misplaced a raw texture. Also fixed them with the proper texture length and width from the data in the partial .txd.