LOS ANGELES — Former reality TV star Spencer Pratt isn’t a superhero.

But a slew of recent viral AI-generated videos portray him as Los Angeles’ lone savior — helping thrust his mayoral campaign against Mayor Karen Bass and City Council member Nithya Raman into the spotlight in recent weeks.

Many of the videos, created by filmmaker Charlie Curran, cast Pratt in cinematic, hero-style scenarios: battling Bass in a lightsaber duel while California Gov. Gavin Newsom and former Vice President Kamala Harris scheme behind the scenes or appearing as a Batman-like figure opposite a Joker-esque Bass. The posts have been viewed millions of times on social media.

Pratt has denied involvement, calling the clips “fan-made” in a since-deleted Instagram video.…