These are forms of the Symphogears introduced in events that are a part of a collaboration with another franchises.
Band Type Gear[]
The Band Type Gear (バンド型ギア Bando-gata Gia?) was introduced in the Kizuna de Tsumugu Kiseki no Uta event as a collaboration with BanG Dream! Girls Band Party!.
| Gears |
Gridman Universe[]
Senki Zesshō Symphogear XD Unlimited had more than one collab with the Gridman universe through several events.
| Events | Gears |
  
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Kaiju Gear[]
The Kaiju Type Gear (怪獣ギア Kaiju Gia?) was first introduced in the Godzilla vs Symphogear event as a collaboration with Godzilla.
| Events | Gears |
 
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Ultraman Gear[]
The Ultraman Gear was introduced in the Hajikeru Hikari to Seigi no Sanka event as a collaboration with Ultraman.
| Gears |
Mage Type Gear[]
The Mage Type Gear (魔導師型ギア Madōshi-gata Gia?) was introduced in the Utai Tsunagu Chīsana Mahō event as a collaboration with Magical Girl Lyrical Nanoha Detonation.
| Gears |
Tales of Symphonia Gear[]
The Tales of Symphonia Gear was introduced in the Kimi to Hibikiau Omoi event as a collaboration with Tales of Symphonia.
| Gears |
Kiramager Gear[]
The Kiramager Gear was introduced in the Kirameite Utaeba event as a collaboration with Mashin Sentai Kiramager.
| Gears |
Stage Girl Gear[]
The Stage Girl Gear (舞台少女ギア Butai Shōjo Gia?) was introduced in the Revue must go on event as a collaboration with Shōjo☆Kageki Revue Starlight.
| Gears |
Cloth Gear[]
The Cloth Gear (聖衣ギア Kurosu Gia?) was introduced in the Kosumo Zesshō Kurosugia event as a collaboration with Saint Seiya.
| Gears |
Stardom Type Gear[]
The Stardom Type Gear (スターダム型ギア Sutādamu-gata Gia?) was introduced in the Symphonic Cinderella event as a collaboration with World Wonder Ring Stardom and had more than one collab with them through several events.
| Events | Gears |
  
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Magical Girl Kaleido Gear[]
The Magical Girl Kaleido Gear (魔法少女カレイドギア Mahō Shōjo Kareido Gia?) was introduced in the Magical Harmony Mune no Negai Kasanete event as a collaboration with Fate/Kaleid Liner Prisma☆Illya: Licht - The Nameless Girl.
| Gears |
Lily Gear[]
The Lily Gear (リリィギア Riryi Gia?) was introduced in the My Guardian Angel event as a collaboration with Assault Lily Bouquet.
| Gears |
Hero Gear[]
The Hero Gear (勇者ギア Yūsha Gia?) was introduced in the Yūretsu ni Warae, Rokue no Uta event as a collaboration with Yuuki Yuuna wa Yuusha de Aru.
| Gears |
Kamen Rider Gear[]
The Kamen Rider Gear was introduced in the Senki Zesshō Symphogear × Kamen Rider 555 Another Testament event as a collaboration with Kamen Rider 555.
| Gears |
