X-Naut

The X-Naut appeared in 2004 video game called Paper Mario: Thousand-Year Door. X-Nauts (originally known as Boomer Gangers) are soldiers that work for Sir Grodus and Lord Crump of the X-Nauts; they all appear in Paper Mario: The Thousand-Year Door. The name X-Naut could be a reference to the game of noughts and crosses, also known as tic-tac-toe. They are short and individually weak, but rush to defend their leader, Lord Crump, if he is threatened. It is unknown what is behind their uniform, as they do not show their true appearance, just like a Shy Guy.

In battle, they attack by charging into Mario or jumping on top of him. They can also use potions to heal each other or make themselves huge; increasing their Attack. They also appear in Bowser's platforming levels, where they attack by charging at Bowser if they spot him.