Boulderon (Japanese version Boulder () is the ボールダー ) Bōrudā Guardian Bakugan of Paige in . His Bakugan: Mechtanium Surge BakuNano is Slingpike and his Mechtogan is Vexfist. His Battle Suit is Blasterate.
He first appeared in
to help fight against A Royale Pain Taylean's Mechtogan, Silent Strike, along with Rafe, Paige, and Wolfurio.
He appears again in
, battling in the Capture the Flag battle with Wolfurio and Mind Search Trister.
, he and Wolfurio defeated unknown brawlers who were using Triple Threat Chaos Bakugan.
, he used Interspace Under Siege Slingpike for the first time and defeated many Chaos Bakugan, with Taylean, Trister, Wolfurio, and Infinity Helios.
, Unlocking the Gate Dan and Drago gave him and the others a piece of their power which enable them to call their Mechtogan.
, he battled alongside True Colors Wolfurio and summoned his Mechtogan Vexfist to fight against the Chaos Bakugan, Rockfist, and Deezall. By combining his attack and Vexfist's, he defeated Rockfist and won.
, he uses a Subterra The Final Takedown Blasterate to fight the Razen Titan clones.
It appears to be a
BakuTactix, due to its G-wheel. The Aquos version has 950/900/1200 Gs and the Haos version has 700/850/900/750 Gs. The Subterra version has 1250 Gs.
Its Bakugan form bears resemblance to Gember and Mo-shogun from Tengen Toppa Gurren Lagann.
Its ball form resembles Warius, especially its arms.
Its Bakugan form also somewhat resembles two other things - Tony Stark's Hulkbuster Armor from Iron Man and The Hammer from .