|Croco did not originate from fanon, and more information can be found on their respective wiki(s). You may read more about it on the following wiki(s):|
|Location|| Tadpole Pond|
|Boshi, Mario, Crooks|
|First Appearance||Super Mario RPG: Legend of the Seven Stars (1996)|
Croco is a crocodilian thief & ally of Mario who first appeared in Super Mario RPG: Legend of the Seven Stars. He is shown to be a very close friend of Boshi as the two of them are shown walking off into the distance together at the end of Mario RPG. He also seems to have a rivalry with Bowser as they are seen taunting each other throughout the game.
Croco is one of the various villains featured in the online game, Mushroom War. This game reveals that he is a cousin to both Sale and Schule Donavitch, both of which went missing some years prior. It also states that he was a mooch off of his cousins' successes before their disappearances, and because of that he had no skills to fall back on, leading to his becoming a thief initially to feed himself but later he developed true kleptomania.
He is neutral towards all factions, living in Bandit's Way and appearing in several other towns of outlaws such as Rogueport. As such, he will steal from players if they let him make contact with their character, and to get the random item he has stolen back they must catch him and defeat him in combat. He also serves as the focus of a number of quests; while most of these have to do with recovering stolen artifacts or preventing him from fixing Mushroom Derby races, another set involves finding his cousins. The players can find both Sale and Schule in Subcon, and talking to them all will lead to reuniting them. As thanks, Croco will no longer steal items if he bumps into the player's character, and instead items that have been successfully stolen from other players can be bought from him.
New Super Mario Bros. Clash
Croco was intended to make an appearance in this game conceived by Eltario, before his departure from Fantendo in late 2011.
Croco is one of the thousands of characters to appear in this 2D action battle royale. In the game his character is of the dual Infiltrator/Saboteur class. His special ability also adds a Mastermind quality to him, as it summons a trio of Crooks to attack other players. Like in his official appearance, he can afflict foes with sleep and can throw random Mario enemies at them. He has access to an item called Weird Mushroom which will restore some health and temporarily boost his defense, although it has a 1 minute cooldown timer.