Better than Gyms for Money

To the southeast of Iwanai Town, you'll find a trainer. His name is Native Iraka. He has 3 Pokemon: Lv. 51 Tropius, a Lv. 51 Exeggutor, and Lv. 51 Staraptor. All of these aren't formidable in the least, if you have a Electivire, or just a Battle Mansion worthy Pokemon the task is simple. For the minimal trouble, you get Ω1836, though not the most amount of money, it is far quicker to farm. He's also OK to train against, so you get a fair amount of Exp. for your troubles, as well.