Breaking Mammoth (ブレイキングマンモス) is a mech created by Hiden Intelligence and incorporated into Zea with the ability to detach and travel to Earth while the satellite’s core remains in orbit. It was originally designed by the previous president, Korenosuke Hiden, for use in large-scale rescue operations, but was later re-purposed for use by Kamen Rider Zero-One in battle. It is summoned by the Breaking Mammoth Progrise Key.
The Breaking Mammoth Progrise Key (ブレイキングマンモスプログライズキー) is used by Kamen Rider Zero-One to access his Breaking Mammoth form. Its ability is Press and it is based on a mammoth. This Progrise Key was created by the Hiden Intelligence Three Dimensional Printing System using the data from the Mammoth Zetsumerise Key as a basis after it was given to Izu by Yua Yaiba in order to destroy the Giger that MetsubouJinrai.net had hacked.