>>34209199Just chansey fights.
Honestly I wish people wouldn't be so down on isle evel up. Sure it's super slow but it trains 18 at once. I've gotten dozens and dozens of pokemon to 100 through it. Ideally you can easily get pokemon to level 45+ easily thorugh a handful of wild battles, then throw them in the islands. I play every day anyway for breeding/battling so I just quickly refresh them and throw them back in. If you have festival coins to spare just get them to level 78 or something like that, use a couple of high level meals, and three rare candies gets them to 100