From the Super Mario Wiki
A Chariot Snifit is a variant of Snifit that appears in Paper Mario: Color Splash. Only one appears in the game, assisting Iggy Koopa and a Chariot Bro in battle at The Golden Coliseum. Due to their chariots, any attack that Mario tries to use on them will be dodged. The only way to defeat the Chariot Snifit is for Mario to use the Bone Thing. The Chariot Snifit attacks by shooting three bullets at Mario.