Chase (Zi-O)

• Height: 202.5 cm^[1]
• Weight: 112 kg^[1]

Ability Perimeters:

• Punching power: 7.3 t.^[1]
• Kicking power: 12.2 t.^[1]
• Maximum jump height: 24 m.^[1]
• Maximum running speed: 100 m. per 6.9 sec.^[1]

When brainwashed and fighting for the Roidmudes, Chase transforms into Mashin Chaser (魔進チェイサー, Mashin Cheisā, lit. "Advance Demon Chaser"), where he is armed with the Break Gunner and drives the Ride Chaser. Since both Heart and Brain only wanted Chase to incapacitate rogue Roidmudes instead of fully destroying them, his arsenal as well was made not to kill their Cores, a trait that was shared from his first appearance as Protodrive.

This form is seen briefly before Chase's first transformation into Kamen Rider Chaser and is indeed still available to be accessed by Chase via the Break Gunner despite retiring it in favor of becoming a Kamen Rider again, as demonstrated when he became Mashin Chaser once more to save Go from Gold Drive following the destruction of his Mach Driver Honoh.

The Mashin Chaser suit includes the following accessories:

• Nightmare Helm (ナイトメアヘルム, Naitomea Herumu) - Head
• Radiator Guard (ラジエーターガード, Rajiētā Gādo) - Right-sided shoulder pad that draws heat from the surroundings as an internal cooling system.
• Core Driviar-0 (コア・ドライビア-0, Koa Doraibia-Zero) - A built-in of the Core Driviar prototype.
• Violet Guard (ヴァイオレットガード, Vaioretto Gādo) - Several purple colored armor surrounding the Night Hide Wear. As a sample of an Advanced Roidmude, Chase shedded a piece of it with his Break Gunner. Giving it to Kiriko, it was then used by Rinna to modify the Rider systems to target Roidmude physiology exclusively to preserve human hosts of the Fusion Evolution State, as well as to create the Kamen Rider Chaser system by linking it to the second Mach Driver Honoh.
• Death Head Shoulder (デスヘッドショルダー, Desu Heddo Shorudā) - Left-sided shoulder pad.
• Armed Impactor (アームドインパクター, Āmudo Inpakutā) - Gauntlets
• Revolt Brace (リボルトブレス, Riboruto Buresu) - Wristbands
• Raid Glove (レイドグローブ, Reido Gurōbu) - Able to punch through 2 cm-thick iron plate.
• Armed Enhance (アームドエンハンス, Āmudo Enhansu) - Right-sided Armed Impactor.
• Pad Impulsar (パッドインパルサー, Paddo Inparusā) - Knee pads.
• Strength Leg (ストレングスレッグ, Sutorengusu Reggu) - Legs
• Tracer Boots (トレイサーブーツ, Toreisā Būtsu) - Feet

Appearances: Zi-O Episodes 47-48

• Height: 202.5 cm^[2]
• Weight: 127 kg^[2]

Ability Perimeters:

• Punching power: 8.6 t.^[2]
• Kicking power: 12.5 t.^[2]
• Maximum jump height: 24 m.^[2]
• Maximum running speed: 100 m. per 7.1 sec.^[2]

Tune Chaser Spider (武装チェイサースパイダー, Busō Cheisā Supaidā, lit. "Armed Chaser Spider") is Mashin Chaser's spider-based attachment extension form that he can assume by inserting the Chaser Spider Viral Core into the Break Gunner. This form debuts in episode 5.

In this form, Mashin Chaser is armed with the Fang Spidey (ファングスパイディー, Fangu Supaidī) pincer.

Tune Chaser Spider's Full Break finisher is the Execution Spider (エグゼキューションスパイダー, Eguzekyūshon Supaidā), where the E-Circular imparts energy into the Fang Spidey before Mashin Chaser slashes a hologram version of his weapon at the enemy.

Appearances: Zi-O Episode 48

• Height: 202.5 cm^[3]
• Weight: 127 kg^[3]

Ability Perimeters:

• Punching power: 8.1 t.^[3]
• Kicking power: 12.5 t.^[3]
• Maximum jump height: 24 m.^[3]
• Maximum running speed: 100 m. per 7.1 sec.^[3]

Tune Chaser Cobra (武装チェイサーコブラ, Busō Cheisā Kobura, lit. "Armed Chaser Cobra") is Mashin Chaser's cobra-based attachment extension form that he can assume by inserting the Chaser Cobra Viral Core into the Break Gunner. This form debuts in episode 7.

In this form, Mashin Chaser is armed with the Tail Whipper (テイルウィッパー, Teiru Wippā) whip made out of a special liquid metal.

Tune Chaser Cobra's Full Break finisher is the Execution Cobra (エグゼキューションコブラ, Eguzekyūshon Kobura), where the Tail Whipper physically detaches from Mashin Chaser's arm so that it can attack the enemy.

Appearances: Zi-O Episode 47

The Core is the basic essence or 'soul' of the Roidmude. Chase's core is shattered when Chase defeated by Another Decade's Rider Kick.

This core is only seen in Appearances: Zi-O Episode 47