C'mon, Wendy, it's not worth it. Let's hurry back to the castle. The kid says he doesn't need us. Let him prove it.
— Larry, Bowser Jr.'s Journey
Larry Koopa, or simply just Larry, is the youngest of the Koopalings. His name was Cheatsy Koopa in the cartoons. He had a green shell until New Super Mario Bros. Wii in which it was upgraded to blue just like his hair which looks like Iggy's and Lemmy's. He appears in all the games to feature the Koopalings. Larry appears to like sports as shown in Mario & Luigi: Superstar Saga, and is usually the first boss on the first world. In earlier games, he was depicted as the leader of the Koopalings but more recently, Ludwig has been known to be the leader.
Larry Koopa is a short Koopaling with blue spiky hair. His head is dark green and blue. He has blue eyes and a blue spiky shell.
Airship: Larry Koopa owns the airship since his debut in Super Mario Bros. 3. However, Mario and Luigi destroys his airship that he has new airships in other games.
Wand: Larry has stolen the wand from the Grass Land king and transformed him into a dog. In the Game Boy Advance version, he transformed the king into a Cobrat. Later, Mario/Luigi defeated him losing the wand as Mario/Luigi returned it to the king. In other games present, Larry has his own wand.
In the cartoons, he was Cheatsy Koopa who calls himself "the emperor of eavesdropping". In Super Mario World, his hair was white-green instead of blue. There are two major differences between Larry and Cheatsy: Cheatsy has drooping shiny eyelids, and his hair is more wild and spikey.
In the amada series, he serves as one of the minions of Bowser.
Larry Koopa was supposed to appear as a boss battle in Super Princess Peach, but he was removed along with all of the other Koopalings.
Larry Koopa is the only Koopaling that was not directly named after a famous musician. 
Although Larry has been shown to like sports, he appears to lack stamina, but this also might be because at the end of New Super Mario Bros. Wii, he walked from the first world to Bowser's castle, which explains his exhaustion, since it is a very long distance.
In Mario Kart 8's Eletrodrome, on the big screen where the Shy Guys and Koopa Troopas are dancing, Larry Koopa is seen in the background as the DJ.
In the English version of Super Smash Bros. for 3DS, Larry is called the leader of the Koopalings in his trophy as a result of an out-of-context translation from the Japanese version. The NA version of the Wii U version corrects this by calling him the youngest instead. Despite this, his trophy information was left unchanged in the European version, likely from failing to understand the context of the translation.