I understand that under no circumstances do you "gotta hand it to" 4Kids, but the composers they had really were undefeated in the realm of making incredibly catchy openings.
While searching around, I recently came upon a Youtube channel that featured promo videos and a podcast that has some really interesting stuff involving the behind the scenes of working at 4Kids. There were also some interesting tidbits from some of the comments too.
For example, thanks to the comments, I've found out that Mollie Weaver (Renee in Mew Mew Power) is now part of an indie band called MIHI NIHIL, where she goes under the name Mihi Vox.
This channel seems to have gone under the radar when it definitely needs some more recognition.