Larry
Larry Koopa is the youngest of Bowser's eight children (supposedly his favorite).
Larry Koopa is the first boss Mario faces in Super Mario Bros. 3, but shows up in the last stage of Super Mario World, the Valley of Bowser. In Yoshi's Safari, he takes over the fourth world Crescent Coast.
Mario & Luigi: Superstar Saga reveals that Larry is a master at tennis.
Cartoons and Comics
In the cartoons, he was named Cheatsy Koopa and was usually scheming up the Koopa's next plan, sometimes with Kooky (Ludwig). A very common animation goof regarding Cheatsy was that his green head was often colored orange, the same color as the rest of his body. One particular shot in the episode "The Beauty of Kootie" even had his head mistakenly colored purple, in the shot where he says "Tell that to the Mario Bros," then in the Super Mario World series, Cheatsy's hair was given a lighter gray-green color and drawn a tad thicker. There are several physical differences between Larry and Cheatsy: Larry's hair is pointed upwards but Cheatsy's hair was flatter and much more untamed; Cheatsy was almost always seen squinting and was given an overbite. Cheatsy was voiced by James Rankin.
In the comic books published by Valiant, he didn't speak English; instead, his dialogue balloons contained various pictures. Only Lemmy was able to understand him.