How To : Money Farming

What's great about this method is that it gives 20k for 5-10 seconds of your time, and can be done by any level.

Go to the Unova Gym. Below it should be the Unova Elite Four. Renbu is one of them. He only has a level 5 Charmander. All you have to do is beat that Charmander, and you get 20k and a free Pokémon.

Alternatively, however, you can farm champion Errietta, but it isn't nearly as efficient.

This was very short, but I hope it helped!