From the Journal of Cartoon Overanalyzations, Pokemon is explained:
Have you ever noticed that the pacing, tone and story development of Pokemon changes after Ash is hit by lightning in the early episodes, how Ash and his world were relatively normal until after the incident?
I have a theory.
The accident with the bike put Ash into a coma. Days later he was found and was hurried to the hospital and treated with heavy medications, which is why Team Rocket became less menacing. The medication took effect and stabilized his coma dreams so that instead of being terrifying, they became idyllic, allowing him to live out his Pokemon master fantasies.
It’s good for a laugh and just a fun exercise in psycho-overanalysis.
full article here