To unlock the Bonus Atari level pack, at the "Unlockables" menu, hold L + R and press X, Circle, X, Circle, X(2), Circle. Highlight "Episode 0" in Single-Player mode, then press Up to access the new levels.
Unlock the following characters by performing the corresponding tasks:
CHARACTER - HOW TO UNLOCK Blue Ninja - Collect 500 gold or beat Episode 2 in Single-Player mode. Gold Ninja - Complete all 45 episodes in Single-Player mode. Green Ninja - Collect 700 gold or beat Episode 3 in Single-Player mode. Pink Ninja - Collect 5,000 gold. Purple Ninja - Collect 1,000 gold. Red Ninja - Collect 300 gold or beat Episode 1 in Single-Player mode.