Koopley

Koopley is a character that first appeared in the game Paper Mario: The Thousand-Year Door for the Gamecube. His species is a Koopa Troopa. He has a blue shell and shoes, yellow skin, and big eyebrows and a mustache. In the game, the residents of Petalburg thought that Hooktail ate Koopley on the account that he's never returned. So Koopley's son, Koops, decides to be a partner with Mario so that he can go avenge his father, and to show that he's brave. Once the duo enter Hooktail's lair, and defeat him, Koopley will pop out of his mouth alive, with the Crystal Star that Mario's been looking for. Koopley then gives the star to Mario, thanking him for keeping his son safe, and for saving him.

Koopley was stuck in Hooktails stomach for over 10 years hiding in his shell. Like most Koopa Troopas, his name starts with a K, and has oop in it. During Mario's quest, Koopley will send you e-mails via the SP-Mail.