Mario + Rabbids: Kingdom Battle. They are enemies capable of teleporting to certain parts of the battlefield, thus evading normal "line of sight" techniques. They can also lure characters towards them and out of cover.
There are two Peek-a-Boo variants, one for each area apart from Ancient Gardens and Sherbet Desert.
- Spooky Peek-a-Boo: Encountered in Spooky Trails, this 180 HP Peek-a-Boo appears to be undead, with a pale body, glowing blue eyes, and black accessories.
- Lava Peek-a-Boo: The other Peek-a-Boo variant is encountered in the Lava Pits, with glowing orange eyes, a magma-like appearance, and 270 HP.
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