"character development" We got to know more about Jessie, James, and Meowth. Maybe that's why they are my three favorite characters in Pokemon. But, yeah, sometimes I did wish we could learn more about the twerps.
"mature themes" 1) 4Kids dubbed it 2) It's aimed toward the whole family, but mostly kids (I could just see it now, some angry soccer mom nags to Nintendo, or 4Kids because they found some sort of innuendo in Pokemon that their child wouldn't even catch till they're older)
"complex plots" 1) the games themselves did not have a complex plot, nor did they need one. 2) once again, it's aimed more toward kids. 3) if you're complaining about that giant plothole with Ash's Tauros, that's 4Kids' fault (as if there was any kid that hasn't seen Elmer Fudd or Porky Pig point a gun at Bugs Bunny or Daffy Duck at least 50 times).
This guy is full of crap when it comes to VG cartoons. Who in their right mind could say GTA would make a good cartoon?!