Brawl Yard
As the name says, it takes place in a yard, similar to the one in the Snagret Hole. An overturned bucket is in the middle of the area, which can be used as shelter from the Decorated Cannon Beetles. There is also no Gatling Groink on the bucket. Other enemies: Cloaking Burrow-nits, Shearwigs and possibly a few Sheargrubs.
There is also a neat trick that allows Olimar or Louie to leave the border. Throw your Pikmin over the barrier, then walk to a Decorated Cannon Beetle that is near the wall. Attack it and, when it buckles, walk in front of it; it might just throw you over the level boundary. Grab your Pikmin and now you can take your opponent's marble from behind! You can't walk as far away as you want, though. There is an "invisible" barrier; you can also see where this is by watching the rocks from the Decorated Cannon Beetles.