Board Thread:Questions and Answers/@comment-9324903-20140122202637/@comment-24209129-20140123083603

Maybe he meets Casey the same way as the Prime, first movie and 2003 incarnaions met their Casey, Raph leaves the lair alone to the surface and meets Casey, the 2 got into a fight and Raph feels terrible after that. Later meets Casey again and both become allies when fighting against the same foe with the other Turtes help