Sombrero Guys are a type of Shy Guy that appears in the game Paper Mario: Sticker Star. Sombrero Guys are the more common member of the Mariachi Guys, found in the various levels of World 2. If the player is battling with a Sombrero Guy as well as another enemy, the Sombrero Guy will play its guitar and temporarily double each foes' attack stat for 2 to 5 turns or it may restore HP to itself and its allies. If a Sombrero Guy is battled alone, it will usually run away if not defeated instantly. Occasionally, it might throw its Sombrero at Mario. They sometimes drop a Sombrero sticker upon defeat.
Unlike other enemies in the overworld, a Sombrero Guy will simply stay in place and play their guitar. If the player goes into battle with an enemy in the vicinity, the Sombrero Guy will jump into the battle as well.