The Raving lunatick is a recurring monster in the series, introduced in the original Dragon Quest. It is a Lunatick with a significantly more garish colour scheme that has gained spellcasting abilities. Its name is a play on the term "raving lunatic".
Raving lunaticks are unusual nightmarish creatures whose main body consists of a purple body protected by a wine-red carapace with a pair of blue antennae on top, multiple blue tentacles, and a longer pair of green tentacles. Its most striking feature is its singular eye which is always turned to face the player. They are able to float in midair by moving their tentacles as though swimming. The "tick" in its name implies the monster is an insect or arthropod of some sort, although in some games they are classified as Demons due to their evil origins. According to their monster descriptions in IX, they were once normal Lunaticks that were raised on a diet of darkness, but were mutated into their current forms after overdosing on it, earning them the disdain of Lunatick queens.
Raving lunaticks appeared from the beginning of the game. They are able to cast both Zam and Heal, along with being able to put up a shocking barrier that has a chance to paralyse any attackers.
Raving lunatick appears as a B-rank monster of the Demon family that can be scouted normally from any banner. It can participate in the Leery lout's Battle Road as a party member.