We have 1 cheats and tips on Arcade. If you have any cheats or tips for Sinistar please send them in here. You can also ask your question on our Sinistar Questions & Answers page.
Fly up to a fully built Sinistar and let him eat you when a UFO is around during the animation. If you get shot before being eaten your remaining lives will appear as -1 but when the game resumes you will have 255 extra lives.