PS1: 30fps. Levels are simplified and some cut out. Lums reduced from 1000 to 800. Instantaneous saving. Characters speak actual languages. Has exclusive non-playable characters.
Dreamcast: 60fps. Most 2D sprites changed to 3D. Zoomed out camera. Exclusive mini-games and changed hubworld. Better textures and resolution. Smooth AA & Widescreen support.
PS2: 60fps, but has regular frame-drops. New minigames, level revisions, new music tracks, 3 new bosses and different Lum distribution. Hubworld changed, one can buy power-ups and minigames with Lums. Obtaining the 1000th Lum is possible. Has better lighting as well. Optional English voice-acting.
GBC: 2D Sidescroller with different story. Has two identical boss-fights. Only 800 Lums obtainable.
Nintendo DS: Port of N64. Some textures simplified and music tracks taken out. Added touch-screen controls.
iOS: Uses Dreamcast Rayman 2 engine. Has touch-screen controls. No mini-games. No Globox Village.
anon August 16th, 2016