Bizarro
Do we need this tag at all? Feels like it's just out of character with a different name. Anyone who is not familiar with the DC Comics concept is referencing will probably not understand it or know about it at all.
Its most recent use is a mistag on a post that just shows Bizarro Superman. Before that there's some Chainsaw Man posts from last year, and the ones before that are from 8 years ago. This time I'm confident that if the tag were to be manually nuked (and replaced with out_of_character) no one would miss it.