Asuka 120% Limited

To use Tetsuko (Asuka's teacher) from RoyVTX
Play the game for 10 hours or above. At select character screen,press up to move outside the box and select Tetsuko.

To use Genichirou (School principal) from RoyVTX
Play the game for 20 hours or above. At select character screen,press all the way down to move outside the box and select Genichirou.

Different color from RoyVTX
When selecting a character,hold L,R or L+R together and press A. Each character has three palette swaps.

Extra options from RoyVTX
At the config screen,pressing L or R will give you extra options like full gauge,auto block enabled,life gauge etc.