>>16422591Resturaunt le wow triple battles.
With happy hour, amulet coin, and pmoney o-power, you get 120k+ per battle too. Full team of lucky eggs(can get more in a chansey safari) + amie bonus + exp o-power(will need a friend to get both max money and max exp) can net you 30k+ exp per pokemon per battle, more if the pokemon is traded.
I got a traded smeargle to lv.100 in 5 battles that way. It also helps if you tm the pokemon you want to train most protect, and have them in the battle from the start to get more exp.
I use a lv.100 Volcarona with heatwave/incinerate. Modest with max IV and EVs in SPA, use the first turn to quiver dance so i don't end the battle before happy hour, and ensure i sweep next turn, and the whole trip takes about 10 mins.
A baby goes from lv.1 to lv.50 in one trip. Higher if it was present for the battle.
You don't need volcarona but it's nice because it's also a fly/flame body pokemon so it should be in your party a lot.