Fly Guy

Fly Guys (, Propeller Heiho), referred to as Propeller Shy Guys in the original Super Smash Bros. and Super Smash Bros. Melee, are a subspecies of Shy Guy that appear in the and  series.

Origin
Fly Guys made their debut in  and has become a common enemy in later Mario and Yoshi games. They fly around and carry items, including s and rare s. Some of them fly back and forth in a set path, while others appear suddenly, move quickly and fly away if not hit in time.

s only appeared in . They appear flying above Yoshi carrying fruit, but immediately fly off-screen if Yoshi eats the fruit.

In Super Smash Bros.
Propeller Shy Guys appear as background characters in the stage.

In Super Smash Bros. Melee
Propeller Shy Guys return as background characters in the returning stage.

Propeller Shy Guys also appear as a stage element in the Yoshi's Story stage where they fly in and carry food, which can be dropped by attacking them.

Trophy
Despite the trophy name and description referring to Shy Guys in general, three Propeller Shy Guys are the only Shy Guys visually represented by the trophy.

In Super Smash Bros. Brawl
Fly Guys appear as a stage element in the stage where they fly in and carry food, which can be dropped by attacking them. They are seen as 2D drawn images to match the stage's pastel aesthetic.

As a stage element
Fly Guys return and reprise their roles as a stage element in the stage.

In Smash Run
Fly Guys appear as rare, harmless enemies (this time as 3D models, unlike the ones in the Yoshi's Island stage). They fly around carrying an item which changes every few seconds, and if not defeated in time they quickly fly away. They can carry food, gold and Custom Parts, which they drop when attacked.

Three Fly Guys appear in one of the ''Survive! Hard'' Challenge rooms, carrying dangerous-to-get bonus loot.

In Super Smash Bros. Ultimate
Propeller Shy Guys return as background characters in the Super Happy Tree stage, while Fly Guys return and reprise their roles as a stage element in the Yoshi's Story and stages.

Trivia

 * The description of the Fly Guy trophy in references the song  by the band.