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.
Boulderon was the last Bakugan to be released in North America.
Its Bakugan form also somewhat resembles two other things - Tony Stark's Hulkbuster Armor from Iron Man and The Hammer from .