That is one snazzy badge.
Don’t look too closely at Tillis’ eyes.
Aaand you can watch cutscenes and play Gyruss again.
Looks like there’s a sound test, too?
Looks like there might also be codes to play certain songs during certain missions?
I don’t think the scores you earn with these unplayable characters count, though. Which is odd, since they don’t play any differently than Shou or Tillis.
You can unlock codes to play as previously unplayable characters like Big and Chris.
Hey look, Elliot and Claris from NiGHTS into Dreams show up in Burning Rangers.