Like their leaders, they're anthropomorphic alien moles with purple skin and also wear soldiers's uniforms and use catapults as weapons.
Lord Hater, Commander Peepers and Watchdogs was planning how conquer Flendar and some of these strategies, all rejected by Hater, were relationed with Mole People. In a presentation directed by Peepers, it is seen how Hater, commandering Peepers and Watchdogs, destroyed Flendar's army until arrive to the king who said that "in his heart he always knew his planet would fall to Lord Hater". But Hater rejected that idea because he thought "Wander would appear and played a song, prepared a picnic or threw a challenge". Another of their strategies consisted in attack with Doom Dragons but Hater said "Wander would tame it with love and then he would have a Doom Dragons's army". Then, Peeper suggested destroy them with an electric-ray but Hater said "Wander, Sylvia and Mole People would steal all available batteries". Another of their strategies consisted in kidnap Mole King in order to sink Flendar under chaos but Hater rejected too because he though "Wander would show Mole People to be self-sufficient and live in equality and harmony and would rescued the King. Next suggerence consisted in uses the Planetary Mind Combobulator, a brainwashing weapon to control Flendar's people only with Hater's evil thoughts, but Hater rejected it too because "the vibrational frequency of Wander's banjo would happen to match the Mind Combobulator". Finally, nest three Peepers's suggerences would consist in; block Flendar's sun (without have in account Wander's warm embrace), melt Flendar's poles (without have in account they'd celebrate swimming pool parties) and burn the crops to make hunger surrendered them (without have in account Wander would give them sandwiches).
Mole People and Mole King are seen in "The End of the Galaxy" to aid Wander and a group of rebels to fight Lord Dominator.