This is a request from Blueshadow245, I did my best but I'm sorry if this sucks since I only watched one episode and like half of another one until I decided to write.
I think that Donatello might be Becky; instead of having a lab like Donnie does Becky has her notebook. She's a person who tends to study things closely and like Donnie she's tall and has the most sense [Don may just be slightly insane though]. It's ironic that she's a red head like April though
I believe that Raphael reminds me of Dudley. Dudley seems to be very demanding and angry as well as the least understood. Raph is misunderstood and can get rather angry as well.
There's just something about Erwin that reminds me of Leonardo, I guess maybe it's his bravery or something.
The monster Scrudge reminds me of Mikey because the other monsters tend to use him for stuff and he doesn't seem to mind he just smiles and goes along with it. Mikey is always happy to go with certain plans and always seems to be bringing happiness to others.
As a stereotype I see Casey Jones as Stan because you know how some people say that Hockey players are stupid and dumb because of their thick skulls and stuff.