The WAHs are a group of individuals in SMG4: The Super Dudes under the influence of Wario wielding the Power Glove. They sport Wario's Nose and zig-zagging mustache; along with this they can mimic Wario saying “Wah!” along with the yell "IT'S-A ME!". The Wahs are also obedient as well, taking Wario’s orders without question. As an example, they assaulted Fat Man and Flame Boi. While brainwashed, the Wahs possess a surprising amount of durability and combat skills, able to give Wario enough time to flee to his lair while holding off reinforcements of the Super Dudes, in the likes of Captain Steve and Sonic Boop.
It is likely that they returned back to normal after Wario lost possession to Mario, since the latter was only interested in scratching his butt as a way of getting justice.