@NectariaKiritsi: ...I think you answered your own question here?
Anyway, I've always been curious about Ash's father. I think it could make the story (if you can even still call it a story) pretty interesting if they finally introduce him. He ought to be someone tough like an Elite Four member, that would be cool.
Prof. Oak is the only human in Kanto (beside Giovanni and Team Rocket), Prof. Oak have 100 million of Dittos ready to take over the other regions
Giovanni made Team Rocket to fight against Prof. Oak evil plans, but Prof. Oak caught on and pay Jessie & James to spend all of Team Rocket's money on useless robots and frame Team Rocket for crimes