|This article is about a trio of allies in Kamen Rider Decade.|
The Arms Monsters (アームズモンスター, Āmuzu Monsutā) were servants of Kiva, each the last of his kind. Composed of Garulu (ガルル, Garuru) of the Wolfen Race (ウルフェン族, Urufen Zoku), Basshaa (バッシャー, Basshā) of the Merman Race (マーマン族, Māman Zoku), and Dogga (ドッガ, Dogga) of the Franken Race (フランケン族, Furanken Zoku), they support Kiva by turning into the weapons that allow Kiva to change form. 「Second Movement ♬ Prince Kiva」 They were absorbed into Beetle Fangire's breast plate and shoulder armor when they question their new king's intentions of removing the human/Fangire coexistence law. 「The Biting King's Qualifications」
In addition to these alternate versions of the Arms Monsters, the original versions appear in the timeline within the World of Den-O in The Onigashima Warship, where the wayward Urataros, Kintaros, and Ryutaros hide within Jiro (Garulu), Riki (Dogga), and Ramon (Basshaa), respectively until they can be rescued.
Isshin Chiba (千葉 一伸, Chiba Isshin), Kōki Miyata (宮田 幸季, Miyata Kōki), and Takaya Kuroda (黒田 崇矢, Kuroda Takaya), voice Garulu, Basshaa, and Dogga, respectively. Their original incarnations in The Onigashima Battleship are played by Kenji Matsuda (松田 賢二, Matsuda Kenji), Yuuki Ogoe (小越 勇輝, Ogoe Yūki), and Eiji Takigawa (滝川 英治, Takigawa Eiji) respectively.