Brain Gremlin
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Real Identity: Brain Gremlin
Appearances: Warner Bros. 100th Anniversary Part 1 and Warner Bros. 100th Anniversary Part 2
Powers/Skills: Enhanced Intelligence
Voiced By: Jeff Bennett
During a tour of the Warner Bros. Studios, Yogi Bear jumped into the Friends fountain which got Gizmo wet. He produced one Mogwai but he wasn't as evil as Robin claimed Mogwai offspring were. Starfire blasted Robin with starbolts before he could destroy him with fire and put him down as Gizmo's plus one. Gizmo and the offspring high-fived. During the party that night, Starfire took them to a photo booth to take pictures despite their aversion to bright light. They also survived the destruction of the WB Shield by Michigan J. Frog for not being invited to the party. Along with the Teen Titans, Daffy Duck, and Yogi Bear, they took the Mystery Machine to the Harry Potter castle, where Cyborg picked up the signal of the first piece of the shield. They found a magnificent feast and scarfed down. To Robin's horror, no one stopped Gizmo's offspring since it was after midnight. The Mogwai transformed into a Brain Gremlin and assured them he was not a bloodthirsty one but one who prided himself on his sensibilities and sophistication.
Brain agreed to use his vast intellect to help them locate the missing part of the shield. Robin was dismayed they would trust such a disgusting little thing. Raven quipped they spent years listening to him so they were used to it. The piece lay behind a green door but Robin was unable to open it, claiming it was under a invincibility spell. Brain Gremlin countered it was locked and they should look under the welcome mat. There was a key but a raven stole it. Yogi found two brooms. Robin thanked him and swatted the Brain Gremlin. Yogi clarified they could chase the raven with them. Robin and Daffy took off. The team met the Wizard of Oz in the locked room. He was angry they trespassed in his realm but Raven used her portal to quickly swipe the piece and they took off. They found a second piece with a friendly trio of Sea Creatures then tracked the last piece to Blockbuster Island, the site of the studio where the big budget movies were filmed. They were soon surrounded by giant natives who were actually bugs.
The natives chanted and a giant Michigan J. Frog came through a giant set of doors. He ate one of the natives and picked his teeth with the last piece. Frog refused to hand it over and did a song and dance before destroying them. Raven convinced Robin to listen to Brain Gremlin's idea. He borrowed Cyborg's nanobots and formed them into a giant Gremlin mecha. Frog was insulted by being disrupted and connected with his tongue then swung the mecha around. The mecha electrocuted him then used eye lasers and Gremlin shaped missiles. They fought cane vs. gauntlet laser blade. Frog got behind and pierced his cane through the mecha. It dissipated. Frog declared it was over but Brain revealed he swiped the piece on the sly. Robin instructed everyone to place a hand on the shield and repeat after him saying, "We are the stuff that dreams are made of." The shield activated and transformed them into buff superheroes in the blue and yellow color scheme of Warner Brothers. Together, they emitted beams from the Warner Bros. logo on their chests and reduced Frog to regular size. Robin grabbed him then they unleashed an energy wave that restored the entire studio back to the way it was.