- For the Guardian in Sonic Frontiers, see Spider (Sonic Frontiers).
Spider is an enemy Badnik encountered in Spring Stadium Zone, the third level of Sonic 3D: Flickies' Island.
Resembling a purple/yellow robotic spider, the Badnik simply shuffles back and forth along a straight diagonal. It can only harm Sonic if the hedgehog walks straight into it. The spikes on its head are purely cosmetic, and will pose no hazard whether Sonic attacks with a Spin Dash or jump. Smash it to recover its organic battery power source, a green Flicky, and make Flickies' Island a slightly less dangerous place.
The name of this Badnik is conjectural, as no official name has been given to it. The name comes from the level editor in a development build of Sonic 3D that is included as a bonus feature in Sonic 3D: Director's Cut. Jon Burton has confirmed that the name was used in the original game.