Batman: Return of the Joker

01.  SZXZONSE	Protection from enemy bullets

02.  SZSZKXSE	Protection from collisions

03.  SXSATXSE	Protection from "electric grids"

04.  AEXILGZA	Start with 1 life

05.  GVXILGZA	Start with 100 lives

06.  GAVXVLZA	Each Backpack Energy Capsule counts as two

07.  AAVXVLZE	Each Backpack Energy Capsule counts as four

08.  AAKOPIZA	Invincibility lasts until next stage

09.  GEOSPKVN	Start with 7 Backpack Energy Capsules instead of none

10.  GEOSTKTA	Start game with 3 life increments instead of 8

11.  GASOTOTA	Continue game with 3 life increments instead of 8

12.  SZXSZSVK	Infinite lives

13.  GXEUIOSE	Don't get stunned when hit

14.  AEUUAPGA + GXKLAOKE	Stand your ground!

IMPORTANT: WITH CODE 15, YOU MAY GET STUCK OR DIE IF YOU KNOCK BACK INTO A WALL

15.  VNULTONN + PEUUGPAA	INTENSE knock-back when hit!