All power-ups
Select the XQ49. Allow the second Boss on the third level to destroy your ship one time. Complete the level with your next ship. Purchase one of any of the following items at the shop: power shot, side shooters, back shooters, auto fire, super shields, or lasers. Everything except mega bombs and lives will filled.
Life mini-game
Power on the Lynx and press A(2) to display the character selection screen. Hold Option 1 and press Up, Down, Left, Right, Up.
Start with 100 lives and extras
Press Up, Down, Left, Right, Down(2), Up(2), B, A, Left(2), Right(2), Up, Down, Left, Right, Up to start with 100 lives, 100 megabombs, full inventory and refreshing energy.
Start with 19 lives and extras
Press Up, Down, Left, Right, Down(2), Up(2), B, A, Left(2), Right(2), Down to start with 19 lives, 20 megabombs, full inventory and refreshing energy.
View programmers
Chuck
Hold Option 1 and press Up, Down, Left, Right, Down(2), Up(2), Left at the character selection screen. This will also enable full inventory and refreshing energy.
Matt
Hold Option 1 and press Up, Down, Left, Right, Down(2), Up(2), Down at the character selection screen. This will also enable full inventory and refreshing energy.
Chris
Hold Option 1 and press Up, Down, Left, Right, Down(2), Up(3) at the character selection screen. This will also enable full inventory and refreshing energy.
Stephen
Hold Option 1 and press Up, Down, Left, Right, Down(2), Up(2), Right at the character selection screen. This will also enable full inventory and refreshing energy.
All power-ups...