Beat All 4 Modes on the Pro Cup setting to unlock Master Mode. In Master mode you play against Dark Rayman in harder versions of the 4 modes.

Race: Beat Dark Rayman in 1 lap Races (All 12)
Time Attack: Get to the checkpoint 3 secs before Dark Rayman to Eliminate him. (All 12 races)
All out fight: Beat Dark Rayman in a 1 min battle at all levels.
Freeze Tag: Get more lums than Rayman in 1 min. At all levels, also the game is Cel Shaded in this mode.