|This article is about a/an form in Kamen Rider Zi-O.|
GenmArmor (ゲンムアーマー GenmuĀmā) is a Kamen Rider Genm-based form accessed using the Genm Ridewatch, invoking Kamen Rider Genm's Action Gamer Level 2. When summoned, it is projected in a holographic Rider Gashat and does Genm's signature pose before dispersing to attach to the user. GenmArmor's Proto Gashat Shoulders (プロトガシャットショルダー Puroto Gashatto Shorudā) are modeled after Proto Mighty Action X Rider Gashats, and depending on whether it is used by Zi-O or Geiz, its visor spells out "Genm" (ゲンム Genmu) in katakana or "Genm" (げんむ Genmu) in hiragana respectively.
After the Genm Ridewatch was dropped by King Kuroto Dan, Geiz tried to use GenmArmor in 2016 to stop Dan's first attack as Another OOO. Despite destroying him with a Critical Time Burst, this was unsuccessful in eradicating Another OOO as Dan had made the contract in 2010 and the year marked on his back only appeared to read "2016" due to a crack, as well as Genm not being the same power as that of OOO.
- "(Digital beeping) Genm!"
- ―Activation announcement[src]
- "The ultimate game master! The Rider who possesses godly talents is... (Clock ticking noise) Genm! (究極のゲームマスター！神の才能を持つライダーは…ゲンムだ！ Kyūkyoku no gēmu masutā! Kami no sainō o motsu Raidā wa… Genmu da!)"
- ―Secondary activation announcement[src]
- "(Right-hand Ridewatch's announcement)! Armor Time! (Distorted Rider Gashat-esque music with Genm's Level 2 ost theme) Level Up! Genm!"
- ―Transformation announcement in the Ziku-Driver's left-hand slot[src]
- "Finish Time! Genm! Critical Time (Break/Burst)"
- ―Finisher announcement in left-hand slot[src]
Genm Ridewatch (ゲンムライドウォッチ Genmu Raidowotchi): Based on Kamen Rider Genm Action Gamer Level 2, this Ridewatch provides access to the GenmArmor used by Geiz. It is dated 2016.
- Critical Time Burst (クリティカルタイムバースト Kuritikaru Taimu Bāsuto): In a manner similar to the Shakariki Sports's Sports Gamer attack, Geiz first punches enemy in sight and runs around the enemy at high speed, destroying any enemies in his track, if any, then delivers a powerful Rider Kick that destroy the enemy.
- The GenmArmor is the first Rider Armor not based on a Main Rider to appear in the show.
- GenmArmor is the first Personal Rider Armor of Geiz where the Transformation Announcement uses a Past Riders Transformation Announcement that is 2 words instead of 1.