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Rattleoid (Japanese Version: Sidewinder (サイドワインダー, Saidowaindā?)) is a rattlesnake-like Bakugan.



Rattleoid is a slithering rattlesnake with a three-pronged metallic tail. Two large fangs release a lethal poison. Indestructible golden horns on its head with bright red eyes are used to hypnotize its opponents. It uses the strategy of camouflaging itself during combat.

Bakugan Official Handbook

Rattleoid and Serpenoid look a lot alike. They're both huge, fierce, snakelike creatures. How to tell the difference? Rattleoid has armor on its head and a rattle on the end of its tail.

Bakugan Ultimate Handbook

The first thing you'll notice on this snake-like Bakugan are its glowing red eyes. Rattleoid will use them to hypnotize you-and then it will strike! Its large fangs contain a deadly poison, and its three-pronged tail lashes out like a whip. For defense, Rattleoid relies on the indestructible horns on its head, and the camouflage pattern of its scales.


Bakugan Battle Brawlers

In the anime, Julie has a Subterra Rattleoid. Billy has used his only once while Julie has used Rattleoid many times. Julie's Rattleoid was eventually sent to the Doom Dimension by Cycloid. But when Julie and Gorem fought Daisy and Clayf in the Doom Dimension, Julie used Rattleoid once again.

Ability Card
  • Poison Fang: Transfers 50 Gs from the opponent to Rattleoid and if Rattleoid loses this battle, the Bakugan that defeated it will lose 100 Gs in the next battle.


Physical Game

The Ventus version has 650 Gs. In Japan, its Subterra version in BCV-04 comes with 340 Gs and 400 Gs.