Did Shredder just wake up one day and say 'I'm going to make some clones of myself! Really ugly ones!'
S1 E22Return to New York Part Two
Ah, the power, I have almost forgotten! The Sword of Tengu! The sword in which I'd laid villages to waste, brought castles to ground, vanquish armies! The sword that I used to conquer Japan and give power to the Tokugawa clan! It is mine once more!!
S1 E24Lone Raph and Cub
Raphael (after catching up with Tyler after he ran off; twirling one of his sais): You can't sneak away from a ninja, kid.
TTyler
Leave me alone!
S1 E25The Search for Splinter Part One
[Donatello has just distracted a security camera at TCRI with a pigeon finger puppet.]
I don't know what's scarier: the fact that that worked, or that Don carries around a pigeon puppet.
These quotes come from Wikiquote's Teenage Mutant Ninja Turtles (2003) pages and are available under the Creative Commons Attribution-ShareAlike License.