Mister Mosquito Codes -

How to do an In-game reset:
While playing the game, push + + + and push + .

Unlock Mother Mosquito:
Press and hold and push , , , , , , , , at the character selection screen. You will hear a shout if you have entered the code correctly.

Unlock Father Mosquito:
Enter the mother mosquito code (above),. now press and hold and push , , , , , , , , at the character selection screen.

You will hear a shout if you have entered the code correctly.

Unlock Two player mini-game:
Press and hold + on controller two after turning on the system. Press to move forward, to jump, and (when the power meter is full) to do a super attack. Or press and  hold and continuously rotate the clockwise at the title screen.