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For the Bakugan in the Battle Planet series, see Cycloid (Battle Planet).

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Cycloid (Japanese Version: Cyclops (サイクロプス, Saikuropusu?)) is a cyclops-like Bakugan equipped with a large hammer made of stone. In the anime, he is the Guardian Bakugan of Billy Gilbert.


Cycloid is a titan-like beast. He is incredibly strong, tough and eager for the fight. He has a single terrifying eye with a short deadly horn on his forehead and two vampire-like teeth. He finds humans both confusing and amusing.[1]

Bakugan Official Handbook[]

This is one eye-normous Bakugan! The colossal Cycloid carries a huge hammer in his right hand. When Cycloid swings its hammer, brace yourself. This powerful Bakugan packs quite a wallop.[2]

Bakugan Ultimate Handbook[]

Just like the legendary monster Cyclops, Cycloid has one lone eye in the middle of his forehead. He's also a gigantic brute with super strength. Cycloid attacks with the horn on his head and his large club. This big brute is always up for battle![3]


Bakugan Battle Brawlers[]

Cycloid was found by Billy near the center of Bakugan Valley. Their debut was marked by a victory against another Subterra Brawler, Julie Makimoto.[4] He and Billy are later tasked by Masquerade to defeat Dan Kuso.[5] After they and the rest of the Top Brawlers ambush the Battle Brawlers, they lose to Shun and Julie.[6] Billy and Cycloid get a rematch with Julie in Germany, though as they are about to send Gorem to the Doom Dimension, Billy has a change of heart and removes the Doom Card, and later quits Masquerade's team.[7] After a loss to Masquerade, Cycloid is sent to the Doom Dimension.[8] Eventually The Top Brawlers are all reunited with their respective Bakugan. Cycloid is later teamed up with Gorem to fight against Rabeeder[9], and then Tricloid[10], successfully defeating both of them. He also helps the Brawlers battle against Centorrior and Druman.[11][12] After the Bralwers beat Hal-G and Naga he returns to Vestroia and says good bye to Billy.

Bakugan Battle Brawlers: New Vestroia[]

Cycloid's power level is increased to 500 Gs upon returning to New Vestroia. He partners with Hammer Gorem against Ace Grit's Knight Percival and Flash Falcon Fly in the newly completed Bakugan Interspace virtual chamber. In round 1, he battles Percival first and gets attacked with Stray thunder only for Cycloid to counter with boom hammer. Percival then attacks with his sword only for Cycloid to swing and hit Percival's energy blast causing Baron Leltoy to get excited. Ace then sends out Flacon fly to help Percival out. Falcon fly uses duel buster causing him to use rocky punch as a counter. Percival's sword counters his punch and Cycloid gets knocked out thus losing round 1. In round 2, Julie Makimoto sends out Gorem to help and punches Percival with grand impact. Gorem continues attacking Percival with rocks. The end of the round is not shown but he and Gorem lose. In round 3, him and Gorem attack Percival with their punches. Percival uses Stuka Enemy causing Falcon fly to attack him and Gorem causing damage. He uses Gigantic Hammer causing Percival to use fly shield to block the attack. Julie then opens up Power Pressure causing Percival to be stuck. Falcon fly then uses Darkus Fly Arrow allowing Percival to attack. Ace manages to defeat him and Hammer Gorem despite the odds.[13]


Ability Cards (Battle Brawlers)[]

  • Right Giganti (Japanese Version: Right Gigant): Adds 100 Gs to Cycloid.
  • Left Giganti (Smackdown, Sinister Smash, Japanese Version: Left Gigant): Nullifies the opponent's Gate Card.
  • Stare Down (Stared Evil Eye, Japanese version: Stared Eyes): Subtracts 50 Gs from every opponent Bakugan in the Stare Down perimeter. It also allows Cycloid to see hidden Bakugan (for example Bakugan has hidden underground).
  • Grand Slide: Moves the opponent's Gate Card to anywhere on the field and allows Cycloid to attack if there is a Bakugan on the card. (Standard Subterra Ability)
  • Copycat: Copies an ability that the opponent used or is using. (Standard Subterra Ability)

Ability Cards (New Vestroia)[]

  • Boom Hammer: Nullifies the opponent's ability.
  • Gigantic Hammer: Transfers 200 Gs from the opponent to Cycloid.
  • Skeet Punch: Adds 400 Gs to Cycloid.
  • Rocky Punch: Subtracts 200 Gs from each opponent.
  • Stealth Swing: Reflects the opponent's ability.

Ability Card (Video Game)[]

  • Right Giganti: Adds 200 Gs to Cycloid.

Physical Game[]


Attribute G-Power(s)
Pyrus Pyrus: 330 Gs, 400 G' (BakuPearl)
Aquos Aquos: N/A
Subterra Subterra: 400 Gs (Japan), 440 Gs (Japan)
Haos Haos: 250 Gs
Darkus Darkus: 390 Gs, 390 Gs (BakuPearl), 510 Gs, 540 Gs, 570 Gs
Ventus Ventus: 350 Gs, 450 Gs, 550 Gs, 580 Gs
Clear PhantomDharak Closed Clear: 510 Gs

North America[]

A Darkus version comes with 390, 510, 540, or 570 Gs, a Haos version comes with 250 Gs, a Ventus version comes with 350, 450, 550, or 580 Gs, and a Clear version comes with 510 Gs.


In Japan, the Subterra version in BCV-03 comes with 400 Gs or 440 Gs.

Video Games[]

Bakugan Battle Brawlers[]

Cycloid is available in Subterra. It has 370 G Power, 4 Speed, 3 Defense, 4 Acceleration, 2 Endurance and 1 Jump. It costs 30,000BP, and is unlocked after defeating Billy's Normal Team (or higher) in the Park.

Bakugan Battle Brawlers: Battle Trainer[]

Cycloid is available in Bakugan Battle Brawlers: Battle Trainer. Subterra Cycloid is unlocked after beating Arena 10.

Bakugan: Defenders of the Core[]

Cycloid does not make an actual appearance but is a possible figure in the Collector's Edition of the game.


  • He is one of the 2 non-Aquos Bakugan in the anime who have an animated mouth, the other being Aranaut.
  • In the video game, his Ability Card is misspelled Right Giganto, instead of Right Giganti.
  • In ball form, his feet are switched and face front from back instead of left and right.