Elmo
Elmo is acharacter inMonster Mix-Up. He is a redKoopa Troopa who is called the stupidest Koopa Troopa byBowser (who also states that red Koopa Troopas are already particularly unintelligent). Bowser summons him after he captures theMushroom King so that Elmo and the king can be combined through hisMonster Mixer. However, Elmo does not appear, andBoom-Boom nervously explains that, as he wanted to take a break from guarding the fortress, he left Elmo in charge. Bowser is angry enough to throw Boom-Boom into the Monster Mixer with aFiresnake. Later, asMario andToad break intoBowser's Castle, they find Elmo and the king after being mixed together, with the king's head and the Koopa Troopa's body. The resulting individual, named the "king-Troopa" in the narration, is being held prisoner withPrincess Toadstool until Mario and Toad find them. The king-Troopa, although being the result of combining two dim characters, is apparently twice as bright now, telling them exactly whereLuigi is being held. Mario does not trust the Elmo part of the mix, but refusing to listen to him results in aGame Over from stumbling into a death trap. He also explains how to solve some of the puzzles in the castle, which is necessary to continue. By the end of the story, the group gets to work splitting everyone from their amalgamation, including Elmo and the king.

