No otherwise his Pokemon would have evolved in less than twenty episodes. Wait...
30-50 episodes is perfect amount in my opinion (and I don't care if a Pokemon evolves 10 episodes after the first one evolves, and so forth) it makes no sense to wait 500 episodes to evolve a Pokemon. Chimchar's staying in it's stage for a duration of 129 episodes was plain stupid (even if only with Ash it was more like 80 episodes) and look what happened with Monferno (even though 31 episodes is more than enough it only showed up 8 times (10 if you include flashbacks) is just not okay. Maybe if Monferno showed up like 18 times out 31 episodes it would be better.
And it's just the idea of something like this:
Bird Fully Evolves
Water Evolves Once
Grass Single-Stage (?)
Fire Stays as is
Wildcard Fully Evolves
That makes my blood boil and eats the heck out of me. I mean he's going to the league with trainers who have fully evolved Pokemon, and he expects to beat them with unevolved Pokemon? Again I know the anime beats that message out that unevolved Pokemon are fine but still Ash is a growing trainer he needs more evolved Pokemon.
Sinnoh was pretty perfect (albeit some pacing issues). I mean Buizel and Gible were fine. But he had 4 fully evolved Sinnoh Pokemon. That's just awesome.
Mamepato- fully evolved
Mijumaru- fully evolved so Ash can get a water starter Charizard/Sceptile/Internape
Fire/Ghost- Fully evolved 3 stager or Fire/bug evolves once since its only a two stage line.
Grass Pokemon- Evolves once if its a two stager.
Denchura- a fully evolved Pokemon
Something like that is really awesome. And hypothetically speaking if Ash gets all starter Pokemon, I really want them to be fully evolved, having 3 fully evolved starter Pokemon of the same generation is just too cool for words.
Think of the Johto starters for a moment: Ash has a triple battle, just imagine Ash sending out Meganium, Typhlosion, and Feraligatr, epic fangasm right there. It's a shame that 5th gen won't be able to pull that epicness very well given the Pokemon themselves. Maybe next generation.
Edit: I would be fine with just Futachimaru if it means giving another Pokemon another evolution.