Bokuchin: Black suit
Select Wiler and do his Wiler Bomb any other bomb with a character on Bokuchin. He will wear a new black suit briefly.
Dark Dragon Claw
Successfully complete the Ryumaou Tournament as Yuka at Rank S with 60 second, two round and normal difficulty settings. Note: You must already have nine medals.
Easier Game
For an easier game, go to the OPTIONS screen and set the difficulty to EASY, then press LEFT 20 times to enable the VERY EASY level.
Harder Game
For a greater challenge, go to the OPTIONS screen and set the difficulty to HARD, then press RIGHT 20 times. You can now access the VERY HARD difficulty setting. Good luck!
Platinum Characters
On game select go to SD HIRYU. From there fight in the circuit. Platinum characters will make cameo appearances before the championships. Each time you beat a platinum character you win a medal. If you collect all 10 medals you can use the Platinum characters.
Play as Bokuchin
To play as Bokuchin you must beat him in a normal game.
Play as Ryumaou
To play as Ryumaou, you have to earn your way up to the "Ryumaou Tournament", and then beat it.
Ryuhi: Red belt
Select Ryuhi and do his Super Kinryuha do Robo No Hana. His belt will turn red briefly.
Ryumaou Tournament
Earn nine medals to play in the Ryumaou tournament.
Virtual Ryumaou
To get Ryumaou on the virtual character select screen, beat SD Hiryu with Ryumaou. After beating it a couple of times you should get the "Skull of Devil King" as a random prize. This enables you to pick Ryumaou at the Virtual Hiryu select screen.
Wiler: Disappearing shirt
Select Wiler do his Ninja Circus. If done correctly, he will not be wearing a shirt while climbing down the stick. However, it will reappear after he gets off the stick.