To answer your question again, yes, Basic Pokemon that have evolved from their Baby forms are treated as evolved Pokemon. In addition, if that Pokemon evolves again, then that Pokemon would be considered a Stage 2 Pokemon.
You can Rare Candy a Pichu into a Raichu, but you can't Rare Candy it into a Pikachu since Pikachu does not say it evolves from Pichu. So if your Poke-Power is disabled, Rare Candy can't help you get out of it unless you've got Raichu in your hand. Just thought I'd want to clarify that.
If you really want to disable Jynxfett, use Omastar (PK) and some Cessation Crystals. Ta-dah.