Batman: Return of the Joker
Books: Nintendo Games Secrets - The Best of How to Win at Nintendo Games
SZXZONSE Protection from enemy bullets
SZSZKXSE Protection from collisions
SXSATXSE Protection from "electric grids"
AEXILGZA Start with 1 life
GVXILGZA Start with 100 lives
GAVXVLZA Each Backpack Energy Capsule counts as two
AAVXVLZE Each Backpack Energy Capsule counts as four
AAKOPIZA Invincibility lasts until next stage
GEOSPKVN Start with 7 Backpack Energy Capsules instead of none
GEOSTKTA Start game with 3 life increments instead of 8.
GASOTOTA Continue game with 3 life increments instead of 8.
SZXSZSVK Infinite lives
GXEUIOSE Don't get stunned when hit
AEUUAPGA + GXKLAOKE Stand your ground!
With the last code, you may get stuck or die if you knock back into a wall
VNULTONN + PEUUGPAA Intense knock-back when hit!