Unlimited Health in Sparx Worlds
When "Press Start" appears at the title screen, press Down, Up(2), Down, Left, Right(2), Left, A.
99 Lives
When "Press Start" appears at the title screen, press Left, Right(3), Down, Up, Right, Up, A.
Level Portals Activated
When "Press Start" appears at the title screen, press Up(2), Down(2), Left, Right, Up, Down, A.
Level Select
Press Up x2, Down x2, Left, Right, Up, Down, A when 'Press Start' appears at the title screen.
Infinite Lives
Go to Winter Fairy Home and below the portal will be a jar. Break it open to get an extra life. Go into the portal to return to Autumn Fairy Home and go back into it again. Below the portal will be another jar. Keep on doing this until you are satisfied with the number of lives you have.
Extra Sparx Weapons-Specials
When "Press Start" appears at the title screen, press Right, Up, Right, Left, Down, Up, Left, Down, A. Then, use one of the following commands during a game in Sparx worlds:
Invincibility shield: Press Up + Select.
Smart bomb: Press Right + Select.
Rapid fire: Press Left + Select.
Homing bombs: Press Down + Select.
All keys: Press L + Select