Imitation Ultraman Ace (SR) (ニセウルトラマンエース
Subtitle: Robot Superman (ロボット超人 Roboto Chojin)
Mega Monster Battle: Ultra Galaxy Legends Gaiden
Stage 1: Cosmic Collision
Imitation Ace first appears with his artificial brothers, confronting Ultraman Zero and the alternate ZAP Spacy crew. However, Zero managed to escape them after killing Imitation Jack and Imitation Zoffy.
Stage 2: Zero's Suicide Zone
He reappeared, this time alongside other Imitation Ultramen, ready to be transported until Gomora was summoned and disrupts the plan, while Darklops Zero awakens and destroys the robot Ultras including the Imitation Ultramen.
- Height: 40 m
- Weight: 45,000 t
- Origin: Planet Cheney
- Powers and Weapons
- Imitation Metallium Ray (ニセメタリウム光線 Nise Metariumu Kōsen): A replica of the similar beam used by Ultraman Ace. Ace thrusts his arms to his left, then he swings them back towards his target and forms his arms in a "L" shape stance.
- Imitation Punch Laser (ニセパンチレーザー Nise Panchi Rēzā): A blue energy beam fired from Imitation Ultraman Ace's Ultra Star.
- Imitation Vertical Guillotine (ニセバーチカルギロチン Nise Bāchikaru Girochin): By forming his arms in a vertical position and swing against each others' direction, Ace can launch a huge energy blade projectile.
- Imitation Ace Lifter (ニセエースリフター Nise Ēsu Rifutā): A copy of Ace's swinging technique.