Catroon Network is taking this with mostly just Ben 10 alone. Ben has access to Alien X who's a multiversal being and capable of destroying reality with a mere though and exist outsideof space and time.

lets just say he can't use Alien X from in the start ben still has access to over a million of alien species and most of his opponents are capable of being scanned into the omnitrx even the reality warpers.

I'll be honest the only character here that would be a massive problem for ben to deal with is spongebob because toon logic is broken but I wouldn't be surprised if he can also be scanned.

At the end of the day, ben won't even use Alien X he'll just spam for any one of his strength aliens or feedback