Hi-Hoes resemble the Goomba from the Super Mario series, except they have no mouth, and their body is entirely robotic, eyes included. A stronger, crimson variant called a Drill Hi-Ho appears, although it is a Combat Class robot, not a Chaos Class one.
The Hi-Ho King is a giant Hi-Ho that boasts a yellow colour scheme.
Hi-Hoes attack by self-destructing near the AegisCam cameras, blinding them. However, Hi-Hoes have very little HP, which can offset their ability to disable the cameras. Additionally, a camera may sometimes receive several Hi-Hoes whenever it is blinded by a certain Chaos Class robot that can send false signals. A giant Hi-Ho known as the Hi-Ho King appears as the boss of the Corneria stage in this game. Unlike a normal Hi-Ho, he can damage the mining base's central tower with his attacks.