As for the Bulbasaur, just why? Why does it need to come back and evolve, why does Ash need a Mega Evolution, why does it have to be Bulbasaur and not something he already has that can, why can't it be a totally different Pokemon he's never owned (as in completely different family)...chances are the other evolved Starters he has will have Mega Evolution's as well. There are so many things behind Bulbasaur, that he really doesn't need him. Lack of specific typing hasn't stopped Ash before and regardless of this "Well Pokemon A doesn't quite suit Ash" (which is complete BS)... Ash can and does make any Pokemon work, even Skiddo (sigh) ._. ...
Some friend you are (JK)
I'm personally against this myself. I was just listing all of the possible options Ash has right now for his Grass type in this series. And besides, even if he doesn't get Skiddo, the only other options are either Phantump or Pumpkaboo, & neither of them will evolve unless Ash and someone else (most likely Serena) each catch one and then trade them with each other, similar to when Ash and Dawn traded Aipom and Buizel
I see a problem with both... but I've covered Skiddo so many times that I'm not doing it anymore (If people refuse to read what I've posted or refuse to admit their is some truth behind it, I can't help you).
I read your previous posts and I understand your qualm with Skiddo, though
IF Ash does catch one, I'm hoping that the writers will be sensible to at least focus on its gimmick-ness for a few episodes & thn treat it like any other pokémon Ash would catch. Plus, while I agree that pure Grass types may be boring, I think Skiddo could be slightly interesting since it's ability is Sap Sipper and the writers can have it use moves like Horn Leech, Bulldoze, and Brick Break.
Also, I know this won't change your mind (and may bring up something else that could get you upset {which I apologize for in advance}) but
IF Ash catches Skiddo, it wouldn't be the first time he caught a gimmick pokémon. Technically, Noctowl would be considered a gimmick too since Ash caught it when shiny pokémon were first introdcuced