Isle Evelup is a place where training can be done. On this island, you can put groups of 6 Pokemon on the island to play, giving them specific drinks in order to boost their stats. Each play session for these Pokemon lasts thirty minutes, and you can set just how many session these Pokemon can go through. Depending on the rank/level of the island, your Pokemon will get, 1, 2, or 4 EVs, respectively, every session they are in.
This means at a Rank 3 Evelup Island, an untrained Pokemon can earn 4 EVs every thirty minutes, which will max-out their total number of EVs after 63 sessions lasting thirty-one and a half hours. Poke Beans will speed the time up to cut the session duration in half to fifteen minutes each. Outside of using Bottle Caps to EV Train you Pokemon, this is the newest, fastest way possible for such.
The first rank is unlocked with 45 Pokemon in your Boxes and 45 Poke Beans, with a Limit of 6 Pokemon per session; the second rank is unlocked with 60 Pokemon in your Boxes and 120 Poke Beans, with a maximum of 12 Pokemon per session; and the final ranking for this island can be unlocked with 75 Pokemon in your Boxes and 225 Poke Beans, with a limit of 18 Pokemon per session.
Available Sessions Include: Level Boost Drink, HP Boost Drink, Attack Boost Drink, Defense Boost Drink, Sp. Atk Boost Drink, Sp. Def Boost Drink, and Speed Boost Drink.