Appendix:User142 Ruby Sapphire walkthrough/Pokémon battles
From Bulbapedia, the community-driven Pokémon encyclopedia.
A one-on-one Pokémon battle is done in the following way:
1) Each side sends out his/her first Pokémon (based on the order in the lineup).
2) In each round, each player does one of the following things:
- a) Uses one of the Pokémon's attacks. (Not all effect the opponent, but they are called attacks in this walkthrough).
- b) Use an item on the Pokémon. This can't be done in battles between Gameboys.
- c) Switch Pokémon.
- Once both players indicate what they want to do, the two actions take place in the following order:
- a) The move Pursuit precedes switching Pokémon; However, if used against aa move, speed is figured the normal way.
- b) Switching Pokémon and using items.
- c) Attacks.
- If both players attack in the same turn, the faster Pokémon goes first. (Some moves, such as Quick Attack, will always go first; Others, such as Vital Throw, always go last.)
3) If a Pokémon looses the end of its HP, it is knocked out. If the owner has an other Pokémon, he/she puts it out and the next round starts.
4) The winner is the player who knocksa out his/her opponent's last Pokémon.
Battles against wild Pokémon are the same, except that you can try to escape the battle. If you fail, the wild Pokémon gets a free hit on you. In addition, a wild Pokémon doesn't have any more Pokémon, or items it can use.
If you beat a single Pokémon, every Pokémon who was up against it and wasn't knocked out gains experience. The experience itself isn't relevant, but the Pokémon advance levels when they get a certain amount of experience. (The amount depends on the level and the Pokémon.)
When you win against a trainer, he/she gives you money for winning. If your last Pokémon faints, you lose half your money and wake up at the last Pokémon Center with all of them healed.

