Duel! 80 vs Seven (激ファイト! 80VSウルトラセブン Geki Faito! 80 VS Urutorasebun) is the forty-fourth episode of Ultraman 80.
When a boy by the name of Naoto is injured by a biker gang, his sorrow and rage towards his circumstances manifests as Minus Energy, which imbues an action figure of his favourite Ultra, Ultraseven with a remarkable power. As the minus energy fully manifests the figure into Delusion Ultraseven, the boy's attackers find themselves at the mercy of the Minus Energy 'clone' and its unending wrath! It's up to Ultraman 80 to find a way to resolve this crisis.
- Ultraman 80 Volume 11 Features Episodes 41-44.
- A slightly high-pitched, off-vocal version of the music from The☆Ultraman: Monster Requiem, is used for the climax of the battle.
- Ultraseven's stock footage is used from The Secret of the Lake, Search For Tomorrow, and The Erased Time.
- The Ultraseven figure prop that Naoto used is a King Zaurus Series Ultraseven figure, which is manufactured by Popy (now known as Bandai).