checked-part =>Full Weapons: Pause the game, key in U U D D L R L R B A [START] and you'll receive full options, weapons, and shields. =>Full Speed & Shields: Pause, then push 5xB 5xA [START]. =>Destroy Onscreen Enemies: Pause and press U R D L U R D L B A. =>Hard Mode: Pause and press U [SELECT] D [SELECT] L [SELECT] R [SELECT]x3. You will no longer be able to use power up items. =>Power Down: Pause and press (A L)x5. This removes your current power-up. ->Bonus Rounds: * Stage 2 - After the ceiling dips and then rises, defeat the volcano on the top and fly through the place it used to be. * Stage 4 - Near the end, defeat the 2nd Re-Bone blocking the narrow passage. Fly down to the bottom of the passage, right next to the wall behind you.