Mas is a gaseous monster who debuts in Super Sam Squad 2: Mas Crisis. He don't lead a single army, unlike Clarx, but is as powerful. He is created by Ludwig, and originally used to destroy Mario. However, Luigi take control over him and cause a crazy rampage, and hopes to destroy Mario by his lonesome. At the end, he turns back to normal but ended up to be controlled again by Tiki Tong. Once beaten again, he get back to normal again and warn the protogonists that Tiki Tong is behind of all of this. For Luigi himself, he ended up to be pursuited by the Robolts.
Mas' name is a portmanteau of gas and mad.
Sometime, if the fans reverse Sam's first name, it will be Mas'.
Mas pick no sides, as he only used to destroy Mario and those who tries to stop him, and is a friend Sam and his other friends.
Although made of some type of gas, his appearance looks more rectangular and solid than round and gaseous.