Mesmer

Mesmer the Goat, a whitish gray ram, was an agent working for of Dr. Robotnik with a 'talent for hypnosis'. He used a large staff with a ruby red jewel to control a whole village into thinking that they were worshippers of an Ancient Sun Goddess, as a test of his powers, in the Knuckles the Echidna Story 'Village Of The Damned' (STC 85-86).

When Knuckles stumbled upon the village, Robotnik (watching from a disguise as a Tavern Landlord, a chicken) used the ruse as an attempt to kill the guardian, by having Mesmer convince the townspeople that they needed to sacrifice him to their god, shortly before being sacrificed Knuckles deduced what was happening and took Mesmer's staff from him, using it to break the spell.

Knuckles was, at the time, on a journey back from Mobius to the Floating Island, and after an explanation from Robotnik, he left. Mesmer was never used again.

Note: though Knuckles used the staff, and Robotnik revealed he intended to use Mesmer to control the whole populace of Mobius, the staff was never smashed.