From Sonic Retro
It's the most basic of all the series. They are equipped with a yellow projectile gun that is capable of vertical movement. It has twin engines and spikes that face the ground. It attacks by firing its projectile gun while moving vertically to adjust its position and hurt the player with its spikes.
|Normal mode||Hard mode|
|Sonic||Final Rush||Metal Harbor|
|Knuckles||Wild Canyon, Pumpkin Hill|
|Eggman||Iron Gate, Sand Ocean, Weapons Bed|
|Sonic Adventure 2|