Here are some cheats and tips for the game Battle Frenzy.
Level skip:
Press Up, A, Up, A(2), Down
during game play to jump to the next level.
Tribolt gun:
Press A(3), Right, A, Right at
the title screen.
Red key:
Press Up(2), B, C, Down(2) at
the title screen.
Yellow key:
Press Down(2), B, C, Up(2) at
the title screen.