World Heroes 2 Jet Cheat Codes for Gameboy

Cheat mode:
Press Right, Left, A, B, Down, A, B, Up at the Takara logo, before it fades. A sound will confirm correct code entry. Super attacks may now be used at any time, Zeus may be selected as a character, and fighting styles may be selected in training and tournament modes.

Fight as Zeus:
Press Right, Left, A, B, Up at the Takara logo.

Jet mode:
Press Up(2), Select, A, Down(2), Select, B at the title screen. A sound and new logo shade will confirm correct code entry.

Power refill:
Press Left, Down/Left, Right, Down/Left, A, B when power is low.