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A green variant of Caterkiller.

— Description, Sonic the Hedgehog Encyclo-speed-ia

The Rattlekiller,[1][2][note 1] also spelled as RattleKiller, is an enemy that appears in the Sonic the Hedgehog series. It is a mass-produced, caterpillar-based Badnik model created by Dr. Eggman, and a variant of the Caterkiller.


Rattlekillers are based on caterpillars, as well as the original Caterkiller. Possessing a body consisting of several segments, it is colored green with yellow spikes on each of its segment parts and has cartoonish eyes with black pupils.


Sonic going near a Rattlekiller.

In Sonic Mania, and its expansion Sonic Mania Plus, Rattlekillers appear exclusively in both Acts of Mirage Saloon Zone. In gameplay, this enemy can be found climbing up or down on the totem poles found throughout the Zone. When approached by the player, this Badnik will spring out from the totem pole and attack the playable character, similar to a Crawlton. A simple Spin Attack to the head can defeat this Badnik however, releasing the Animal inside.

At the end of Sonic/Tails/Mighty/Ray's version of Mirage Saloon Zone Act 1, the Heavy Magician will transform a Rattlekiller into the Uber Caterkiller.

Powers and abilities

The Rattlekillers are excellent climbers with flexible bodies suited for slithering up and down thin vertical objects and launching long-ranged jabs. They also have quite the bite and spikes covering their bodies.



  1. While not listed in any instruction manuals, the internal files in the PC release of Sonic Mania refers to this enemy as "RattleKiller" and "Rattlekiller".


  1. Flynn, Ian; Sega (8 December 2021). "Sonic Mania". Sonic the Hedgehog Encyclo-speed-ia. Dark Horse Books. p. 254. ISBN 978-1506719276. "Rattlekiller - A green variant of Caterkiller"
  2. Live Sonic Mania Developer Playthrough. Stealth (20 August 2017). Retrieved on 22 August 2017.

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