>>105824686He's pretty strong and could handle pretty much all characters in the series. But there's a few decent cosmic and reality warping characters that could easily beat him if they wanted to, like Silver Surfer of Mxyzptlk.
Of course, in any scenario, a decent amount of heroes could beat him because it all depends on what alien Ben decides to turn into first, and knowing his cocky dumbass, instead of turning into someone useful like Gravitak or Alien X he'd go fucking Feedback or Spider-Monkey.
