These enemies are essentially mobile Yellow Big Gel Trees, attacking in nearly identical ways. They can be very dangerous if the Bait strategy is not used to keep them fixated on a character out of harm's way. With the Bait strategy, they become no more dangerous than the Green Box Wheels. Treat them the same way as the latter; Bait, and then Freeze them. They have a weakness, however; their sheer size (being 3x as big as a regular enemy) prevents them from hitting characters at the far edge of the screen (See image on the right).