Agreed, G.I. Joe can out number and out tech the turtles.
If He-Man had his crew, I'd bet that they would be more than a match for the Thundercats. Lionel V. He-Man, I go with He-Man.
JLA v. X-men..... There have been a lot of X-men, and a lot of Justice leaguers. The member to beat though, would be Green Lantern.
Here's the square off..
Superman- Xavier would psyche him out
Batman- Wolverine is smarter, faster and stronger
Wonder Woman - Rogue- good battle, don't know who would win
Flash II - Quicksilver. Flash would destroy him
Green Lantern II- Jean Grey? - Lantern would win
Martian Manhunter - Darwin would be a pretty god fight. No matter what happens, he addapts
Green Arrow- Kitty Pride could beat this wuss.
Atom II - anyone with a foot can beat him
Hawkman II - Angel would fight and lose
Black Canary II - Banshee would beat her easily
Phantom Stranger - I bet the Scarlet Witch could beat him.
Elongated Man - Iceman
Red Tornado II - Storm had his powers, plus more
Hawkwoman - Rogue could beat her.
Zatanna - She's adorable, but almost anyone could beat her
Firestorm - .....dunno, depends on the X-man, and their state of mind. Legion for example could probably beat him, but he's insane, and dead, so...