Egg Spider, as the name states, has an appearance similar to a two-legged spider. It is mostly grey with some black and yellow stripes. Its has yellow legs and on the bottom torso, an Egg Mobile-like pod is located.
The key to defeating this boss is that the player must be able to get air on top while still being able to damage Eggman. In order to defeat this boss, the player must hop on the icicles that Eggman drills from the ceiling. Touching any part of the bottom of these icicles will damage the player. Eggman will start dropping two to four icicles depending on how many hits the player has delivered.
Sonic is the only character that has to defeat the Egg Spider conventionally, as each other playable character has an unconventional way in which they can attack Eggman; Tails can swim to the top of the screen and attack Eggman with Propeller Flying, Knuckles can tread water once he reaches the surface, and Amy can attack the Egg Spider with the Jump Attack.