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Piercian (Japanese Version: Guardian ガーディアン) is Baron Leltoy's Bakugan Trap and it is in the shape of a cube. It is similar to another Bakugan Trap called Zoack.

It is also part of the BakuSteel Trap series in Bakugan: Mechtanium Surge.



Piercian is a Bakugan Trap which connects with Nemus to create a dynamic one-two punch. He has two colossal shields attached to his forearms for protection, which we can also throw like discs to crush his challengers. Piercian's towering block legs provide tremendous stability to sustain the mightiest of punches. He can also fly by spinning his shields above his head.


Bakugan: New Vestroia[]

In episode 11, he first appears and takes down Altair and Wired with Mega Nemus and burned it.

In episode 23, he helps Mega Nemus take down Mega Brontes and Dynamo.

In episode 28, he helps Saint Nemus battle against Dryoid. He is defeated along with Saint Nemus and the Haos Energy is taken.

In episode 36, he helped Master Ingram, Saint Nemus, Hylash, and Shadow Wing battle Boriates.

In episode 43, he helped Saint Nemus battle Aranaut, but he was defeated along with him.

Ability Cards
  • Haos Bunker: Transfers 200 Gs from each opponent's Bakugan to your Bakugan.
  • Tank Bunker: Transfers 200 Gs from the opponent to Piercian.
  • Soliton Defender (Soliton Keeper, Japanese version: Soliton Deflector): Nullifies the opponent's ability that has just activated.
  • Explode (Electrocution): Subtracts 200 Gs from the opponent.
  • Eternal Cocoon: Protects any Bakugan and cancels all attacks targeting that Bakugan. Piercian may not attack while this ability is active.


  • Piercian seems to be based on a fortress.
  • In episodes 23, 36, and 43, Baron calls Piercian by its Japanese name “Guardian” instead of Piercian.