Im only doing the more complex ones that need more grinding. most ap stuff just requires you to play.
1. Buy and Sell for AP
There's a shop in Gearen City that sells Reverse Candies. If you're around Goldenleaf, use the van guy in the corner of the town. Continously buy reverse candies and sell them.
2. Evo stones
Get a pansage, pansear and panpour in gearen park (buy nest balls from the pokeball emporium) and then buy water, fire and leaf stones from the kid in The Lost Camp.
3. finding pokeball items
actually use your eyes and go to each previous area you can.
4. shiny hunt