Springtrap

Springtrap is an unlockable character and ally in FNaF World. He first starred in Five Nights at Freddy's 3 as the main antagonist.

In the main story, Springtrap is the animatronic suit that Purple Guy donned in an attempt to escape the souls of his victims. The plan backfired, as the springlocks designated to prevent the animatronic parts from closing around the wearer failed, almost killing the murderer in the process.

This apparently hasn't occurred in FNaF World, as Purple Guy's sprite appears to be well intact.

Appearance
Springtrap is similar to his counterpart from the core series, except he is smaller. He has greenish-yellow fur and light purple eyes. He has four fingers and three toes. Springtrap has multiple tears scattered over his suit, but he lacks the ripped open part of his chest and noticeable endoskeleton legs his FNaF3 counterpart has.

In FNaF World
Springtrap is a playable character in FNaF World. He is unlocked via fighting him in battle and if the player wins the battle, he will join the player's party. Springtrap is primarily offensive, as Bite 2 makes him able to do high damage on two enemies, Springlocks hits everything on the screen and does max area damage and Rainy Day lowers enemies defenses, making them more easy to defeat.

Trivia

 * Springtrap's core series counterpart contains crucial hints that Purple Guy's dead body being inside Springtrap's suit. However, in FNaF World, he is not.