Challenge Mode in Pikmin 2 is very different from the one in the first game. To unlock Challenge Mode, you need to get The Key from the final floor of the Citadel of Spiders in the Perplexing Pool. Challenge Mode takes palce in many cave areas and you'll need to collect The Key to advance to the next level or exit the level. In each level, you are timed to advance to the next level. You can get a White Flower, which means you completed it but some Pikmin died or a Pink Flower, which means you beat the level with all of your Pikmin intact. There are 30 levels in all.
Levels
- Explorer's Cave
- Novice Training
- Lost Toy Box
- Creator's Garden
- Green Hole
- Hot House
- Brawny Abyss
- Red Chasm
- Trampled Garden
- Twilight Garden
- Cryptic Cavern
- Concrete Maze
- Collector's Room
- Dweevil Nest
- Cavernous Abyss
- Snack Pit
- Three Color Training
- Hazard Training
- Cave of Snarls
- The Giant's Bath
- Rumbling Grotto
- Subterranean Lair
- Hidden Garden
- Abduction Den
- Secret Testing Range
- Breeding Ground
- Cave of Pain
- Bully Den
- Sniper Room
- Emperor's Realm