Alien Babarue is a cunning alien with a vendetta against the Ultras and an antagonist who has appeared several times in the Ultraman franchise.
Alien Babarue first appeared in episodes 38 and 39 where he kidnapped Astra, the younger brother of Ultraman Leo, froze him in a block of ice and assumed his identity. He then stole the Ultra Key, the device that sustained the Land of Light's orbit.
Alien Babarue then heads to Earth pursued by the Ultra Brothers where he tricks Leo into fighting the Ultras. However, Ultraman King arrives and exposes the imposter Astra as really being Alien Babarue. His disguise lifted, Alien Babarue flees.
After the Ultra Brothers restore the Ultra Key, an angry Babarue attempts to stop them, but is held off by Ultraman Leo while the real Astra goes to return the Ultra Key. Babarue was then destroyed by Leo with his Leo Kick.
Disguising himself as Hunter Knight Tsurugi, Alien Babarue traveled to Japan to cause havoc. In response, Mirai transformed into Ultraman Mebius to fight off the imposter. The real Hikari soon arrived to fight Babarue, but he was unable to clear his name in time and thus his host, Captain Serizawa, was locked up.
After Babarue returned still disguised as Tsurugi to continue his attack, Serizawa was set free by Mirai and transformed into Hikari to challenge his imposter again. Transforming into the real Tsurugi, Hikari fought Alien Babarue and exposed him before destroying him, thus clearing his name.
Ultra Galaxy Mega Monster Battle
Alien Babarue appears in episode 4 where he sends Antlar to attack ZAP SPACY. After Antlar was brutally beaten down by Rei's Gomora, Babarue called Antlar back and the two retreated. The two presumably died when Alien Rayblood destroyed Planet Hammer.
Mega Monster Battle: Ultra Galaxy Legends The Movie
Alien Babarue appeared as a member of the Belial Army. He attacked Rei alongside Alien Nackle, Alien Magma and Dada. He was killed after Rei transformed into Reimon and destroyed him with a kick to the chest.
Alien Babarue appeared in episode 7 as one of the monsters cheering on Ginga in his fight against Dark Galberos.