X-Men

Level select:
Hold Down + A + C and power on the Genesis. With those buttons held, hold Start when the "Press Start" text appears on the opening screen. Continue to hold the buttons until the difficulty selection screen appears. Select any difficulty level and character, and walk to the right when the game play starts. Eight panels representing the eight game levels will appear on the wall. Crouch in front of a panel and press C to jump to the corresponding level. Note: This code will not work if a controller is plugged into port two.

Full life:
Enable the "Level select" code. Select two-player mode. Hold Down + A + C. Remove the controller from port one and plug it into port two. Press Start. Select characters, a starting level, and begin game play. Press Start(2) for full life.

Hint: Nightcrawler: Advantages:
One of Nightcrawler's special advantages is if you go up to an enemy and bamf, the enemy will die. Unfortunately, this does not work on Bosses.
Information in this section was contributed by jared_r_d.

Nightcrawler can teleport with one of the X-Men. To do this, hold A, go near them, then release A. Note: This ability will take up your power grid. This move works with Gambit, Wolverine, or Cyclops.
Information in this section was contributed by Benjamin J Nichols.