How do you get much money on Pokemon ruby?

Answer 1

You battle as many trainers as you can and sell anything you don't want or need, like a Nugget, or Stardust. To increase the money you get from trainer battles, have the Pokemon in the front of your line-up hold the Amulet Coin your mother gives you after you defeat gym 5. Be on the lookout for the flashing square Pokeball symbol next to the names of Rich Boys, Ladies, and Gentlemen, as they give a lot of money already, and, for Rich Boys and Ladies, at least, you can earn 10800 from one battle if you have your front Pokemon hold the Amulet Coin.

A good way to make money in the beginning is when you're training your pokemons have some zigzagoons with youu because they will find items and after a couple of item you will have some good items to use and to sell.

source: myself

Answer 2

Keep beating the elite 4 / Pokemon league.

Answer 3

you must use cheats to get infinite money on every Pokemon game.
just have a strong team and vs the elites lots of times. and make sure one of your Pokemon have a amuletecoin.

Answer 4

using the VS. seeker.