Kuzzle is an elderly Koopa Troopa encountered during the events of Mario & Luigi: Bowser's Inside Story. He enjoys doing puzzles, to which his name is a reference, substituting the "p" for a "K", to reflect his species. He has a crimson colored shell, and unlike other Koopas, cyan colored skin. Kuzzle says that he never cared about his looks, only his mind and prides himself on being able to quickly solve puzzles.
Kuzzle is a Star Sage, but unlike the other two, interacting with him is optional, as his Star Cure had been stolen by Bowser some time before the events of the game. If he is spoken to, Kuzzle will tell Mario and Luigi about how Bowser barged into his house in a rage one day, but Kuzzle's attempts to placate him with a puzzle just angered him more and he trashed the house before leaving with the Star Cure. Some time after that, Kuzzle inadvertently turned all his furniture into puzzles, and the Puzzle Sacks the pieces were held in scattered across Plack Beach, where his house is located. Mario and Luigi go find the Puzzle Sacks, receiving one of every type of bean after finding each of them and placing them together. If all of the furniture is put together, the Mario Bros. will receive 10 of each type of bean in original game and five of each type of bean in the remake.
He shares the same role in Mario & Luigi: Bowser's Inside Story + Bowser Jr.'s Journey, although he also plays a role in Bowser Jr.'s Journey. In it, he takes in Iggy Koopa (who was left amnesiac thanks to the BFF knocking him off a cliff earlier with the intent of killing him), mistaking him for his long lost grandson Charlie. After Iggy is cured of his amnesia, Kuzzle sees Kaley fly past and reveals that he has a lot of grandchildren, thinking Kaley is one of them.
Names in other languages