The dim Labyrinth is a dark infinite labyrinth in 2-player mode. It has many breadbugs in which will try to steal your marble(s). Be careful not to get lost in the labyrinth {if you do become lost, then have your pikmin carry something and follow them back to the onion}.
Shearwigs
Sometimes if you dig up a marble you might find 3 Shearwigs, this could be troublesome, dig up marbles with caution.