The Clown Prince of Crime
Super Freak
Stealing chemicals I'm assuming so Sacks could try to recreate the mutagen. He's persistent that Sack/Shredder. After 15 years you think he's find another angle. lolWell, he wore a suit because that's his thing That's why they call him shredder. I don't think he was just waiting, his foot clan was doing stuff in the meantime, right? What were they doing in the beginning? Stealing something? I guess that's what Shredder was doing
And re: spoiler
April grabbed the mutagen from Sacks, Shredder got a hold of it on the roof and stuck it to his belt. I thought she'd go for it when they swung her, but she just kicked him in the face instead and he went down with the canister. At the end hes' in his Loki crater with the broken canister beside him. Hell, before then there was no mention of the mutagen being needed to save Splinter (unless I missed it). Trying to not to nitpick, but that's the main thing that really bothered me.
There was actually one scene and someone, maybe it was Leonardo, who said that the mutagen could save Splinter, but yeah, I guess they didn't show how they saved him if Shredder was holding it at the end