|Introduced in||"Memories of Boom Boom Mountain"|
Electroids make their first appearances in "Memories of Boom Boom Mountain." There are at least six of them shown, and they get into an argument with Plum Frog. They accuse him of stealing their triangle, and Plum Frog accuses the Electroids of stealing his plum. Finn eventually works out a plan so that the Electroids get their triangle back while returning Plum Frog's plum.
The Electroids are generally a shade of blue or gray. An Electroid's entire head and torso is combined and sphere-shaped. Their limb joints are marked by circles. Whether they have arms or legs varies.
That guy stole our triangle!