Lord Dregg vs. 2003 Shredder
 

In this fight, Lord Dregg has his Morpho Genesis Exoskeleton that he had in the last episode and this Shredder would have the abilities he had in Turtles Forever, i.e. shape shifting weapons, size changing ect.

I'd imagine Dregg is smarter but Shredder would be a better martial artist. What do you think?

Hmmm... don´t tremember too much about Dregg, but I think that, even w/o shape shifting weapons or size habilities, Shredder will win the figt, it may not be an easy fight, but he´ll be the winner.

It'd be close. Aside from shooting eye lasers, Dregg with his Morpho Genesis Exoskeleton allows him to shapeshift not just his hands but his entire body and he can grow extra limbs, has x-ray vison, can camouflage himself to avoid detection ect.

Shredder is a great martial artist and has way more experience in hand to hand combat than Dregg but Dregg seems to be more intelligent.

It would be very close but I think Ch'rell would win.

They would probably be evenly matched. Dregg is more cunning, but I'd say Ch'rell would have a good chance of winning, as he's more experienced at fighting.