I was wary going into this that my love for TMNT 2 from when I watched it over and over as a kid would have me too defensive of the movie to enjoy the episode, but it's great to have them all together along with Adam Pally, who's always hilarious!
Although, I was surprised they didn't mention two moments of genuine, good comedy.
Omission 1:
Splinter has scolded them for not being very ninja-like and has Michelangelo do a bunch of backflips. He heads of to do them and we see him start and for the rest of the scene we can hear him do them in the background. Until Leo walks off and the camera pans along with him to reveal Mikey in the background just clapping his hands and counting. He realises he's caught and starts again.
Even now that's still pretty funny.
Omission 2:
The turtles have broken into the foot's lair looking for Raph. They get in and there's a bit of dialogue, "seems quiet…" to which one of the turtles replies, "…a little too quiet". They continue and come across two gaurds. Knocking them out they comment, "huh, that was easy…", "a little too easy".
When they finally spot Raph, donatello says, "Look! There's Raph!", to which Mikey replies, "…a little too Raph"
That's genuinely one of my favourite jokes!