Cursed Mini Mario

Cursed Mini Mario is a possessed version of Mini Mario that appears in Mario vs. Donkey Kong: Tipping Stars. It appears to be under the control of a small robotic monkey that attaches to its head.

Mario vs. Donkey Kong: Tipping Stars
Cursed Mini Marios are activated without input from the player and start marching onward, interacting with other elements the same way a normal Mini would. However, they are harmful to other Minis and can destroy them on contact, resulting in a Game Over. They are also impervious to enemies, long-distance falls, and spikes, on which they are able to walk normally. As shown in Level B-14, Thwomps come to a stop when they hit a Cursed Mini Mario. A Cursed Mini Mario can be turned back into a normal Mini Mario if attacked with a Hammer, Cannon launch, or a slide, after which the Minis can advance to the door as usual.

Mini Mario & Friends: amiibo Challenge
In Mini Mario & Friends: amiibo Challenge, a Cursed Mini Mario can be seen in the background of an in-game advertisement for Mario vs. Donkey Kong: Tipping Stars.