If I was batman, I would have just called bat-mite and wiped the earth clean of any super-heroes or villains in a snap. Maybe Mr Mxyzptlk would have saved superman but everyone else would have been gone.

Batman: Just show him a recording of his parents death while he’s out of suit and gas him.

Superman: There are many different ways to defeat the Man of Tomorrow, my personal choice is golden kryptonite.

GL: Just paint a room and everyone in it then throat punch!

Wonder Woman: Cut the lasso of truth using Superboy or Supergirl since Clark is depowered and then freeze her.

Aquaman: When he’s out of the water crank the heat up to 100 and have fish for dinner.

J’onn J’onnz: Same as Aquaman but a lot more hot.

Flash: While Flash is spewing some stuff about family, shoot him with cold gun and then shoot him with the mirror gun.

Cyborg: Install a horrible virus.

Green Arrow: Snap his arrows.

Cutting the lasso of truth won't hurt Wonder woman.

What about in Superman: Red Son? It weakened her

Alternate universe, different rules.

And green lantern is not weak to yellow anymore nor is martian manhunter vulnerable to fire.

Alright, thanks for informing me

Does every superhero in DC have a 5th dimension of themselves (batman has batmite, Robin has Robinmite from Teen Titans, etc.) Superman seems to have Mxyzptlk (⬅️I’m not sure how anyone can say his name backwards or forwards) and not a miniature version of himself for some reason like Robin & Batman do. Is Batman and Robin the only 2 heroes that have miniature versions of themselves?

I don't think robinmite is canon in the comics. I only know three characters who have 5th dimensional fans and those are Superman (Mr Mxyzptlk), Batman (Bat-mite) and Aquaman (Qwsp)

There’s no Supermanmite?