I didn't realize this the first time I played Pikmin 2 on the Gamecube, but this is just the Pikmin 1 maps with a bunch of caves on them. Nintendo pulled a "Tears of the Kingdom", the lazy bastards. The caves are awful, discouraging exploration by being small and tunnel filled, and highlighting the limitations of the game's Pikmin controls by filling them with enemies that have attacks which are harder to move 100 Pikmin out of the way. If you have a choice between playing Pikmin 1 or 2 I would go with 1, exploring is more exciting and there are not caves to pad out the game.