Ka: Yamada-ke No Natsu Cheats & Codes

2 Player Duel Mini-Game

Press and hold ''Start'' and ''Select'' on the 2nd controller after turning on the PS2, to activate amini-game. The controls...
Square button = accelerate 
X button = jump 
Triangle button = rocket attack (when the gage is full) 
Goal is to knock the opponent out of the ring to win.

Play As Mama Mosquito

At the selection menu, hold L1 and press up, right, left, down, square, square, R1, R1, R1 A yell will confirm is the code has been properly entered.

Play As Papa Mosquito

First unlockMama mosquito, at the selection menu, hold L2 and press up, right, left, down, square, square, R2, R2, R2 A yell will confirm is the code has been properly entered.