To win every match (Against the computer players), pick Bahn as your character. When the game starts just press the D-pad in the direction of your opponent and hold it and press B to do a super punch. Repeat this procedure to win the match, and sometimes unharmed!
Finish the game on the hardest setting with any character, and they will be selectable on the Character Select Screen by scrolling past the visible list of characters.
Highlight a character and press up or down.
Pause the game and press X, Y and Z.
To get an extra character beat the game on any difficulty setting to get Mahlor. Also when you beat the game go to the practice mode and theres two people there.
Each time you finish Arcade Mode with a different character, new portraits will be added to the Portrat Gallery in Options+ To get the extra Tokio pictures, finish Arcade mode with him as normal, then again using MORE than Ten Continues. To get a secret picture of Kumachan and Bark and Bean, finish Arcade mode on the default settings without using any continues using any character.
Do 350 moves in the training mode. Invisible walls will be in the options plus menu.