Spider-Man and the X-Men in Arcade's Revenge

Extra lives:
Locate the fourth green globe on the Gambit stage. Position your character just to the left of the globe, then leap over it to go off the screen. Land back to where you jumped to earn approximately 40 stars. Repeat this jump to earn an extra life for every 100 stars collected.

Hint: Defeating Juggernaut on Wolverine's second stage:
While being chased, try to cut the weights/ anvils that are tied onto a rope hanging from above. Make sure at least three of them fall on Juggernaut's head. Try to cut all the weights hanging above. Before you hit the dead end, keep hitting Juggernaut with your claws. Eventually he will explode.