Jafar was in only one episode but he should have been a regular character because he and Hades have great Shredder-Krang like chemistry and it's easily one of the best episodes of the series. Pain and Panic are the clumsy idiots of the show like Bebop and Rocksteady so I figured the writers were inspired by the TMNT cartoon.
I haven't seen too much of Jackie Chan Adventures cartoons but I can check out those episodes.
Seeing Shredder/Krang-like relationships always make me laugh.
