Press down 10 times during the screen before the fight while the players are talking to each other.
Brawly vs. Goku
To play as Brawly vs. Son Goku in the versus match, press Up, X, Down, B, L, Y, R, A during
the intro where you see Son Goku's hand's flying toward the tower in the sky.
Hold Y + X + B + A then hit Select during any match and your character will surrender.
At the beginning of the game, right before Gokou starts speaking in black screen, quickly push the L and R buttons on the second player controller. If you did the code right, the "2" in the title screenwill be flashing. The slower it flashes, the faster the game will be.