Challenge Mode in Pikmin 2 is very different from the one in the first game. To unlock Challenge Mode, the player needs to collect The Key from the final floor of the Citadel of Spiders in the Perplexing Pool. Challenge Mode takes place in many cave areas and you'll need to collect The Key in each to advance through sublevels, and so complete the level; doing so unlocks further levels. There are 30 levels in all.
In each sublevel, a time limit is given, within which you must advance to the next sublevel or fail the challenge. Being awarded a White Flower upon completion means that one or more Pikmin has died, while a no-death completion earns a Pink Flower. A widely held misconception is that in order to beat challenge mode, one must collect all the treasures and have no pikmin losses - but only the key on each level is required. To unlock a special cutscene with Louie you must complete the challenge mode with all pink flowers.
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