This is a rather annoying enemy that rushes around leaving a trail of heat clouds. As with the other enemies, use Freeze and Ice type weapons to destroy them. They're a bit easier to deal with then the rest of the enemies, as they have lower LP. Since it is a wheel enemy, the bait strategy should be used when facing a group of this enemy in the third screen of the stage. In other circumstances, there is only one amongst the two trees with it. In this case, lure it to an area that isn't infested with trees and kill it off quickly.