Pokemon usually fight one on one, although there are types of battles where there can be more. You can only have six pokemon ready for battle at any given time; you can have more pokemon than that in general, but the rest have to be... stored? I'm not sure how to explain that - it's something to do with computers, but my world doesn't have those so I don't understand the logic.
The pokemon do all the fighting. You can give them items to use during the battle, and maybe tell them what moves to use, but otherwise they do all the work. The battle ends when one side's pokemon are all unable to fight. They usually faint, and you can take them to PokeCenters afterwards to heal them so they can recuperate.
There are eight gyms to a region, and two main regions here: Johto and Kanto. Gym leaders have two kinds of teams: regular and elite. The elite teams are all as strong as they can be, and there are six pokemon you have to fight; otherwise, you'll be fighting three of their pokemon, one after the other. If you and your pokemon defeat all eight gyms, you get something called a Megastone, that lets one of your pokemon grow even stronger in battle, but you can only use those if you're fighting an elite team.
The gyms also aren't the only places where battles take place. There are a lot of trainers along the routes and in the cities, and they tend to consider eye contact a challenge. It's considered very rude to turn them down. That part gets very frustrating.
Sometimes wild pokemon will attack you. If you weaken them without killing them, it's possible to capture them and add them to your team; you catch them with the little balls like the one your Oddish came in. Some pokemon seem to want to test potential trainers first and that's why they attack; others either just want to fight or see you as a threat.
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Pokemon usually fight one on one, although there are types of battles where there can be more. You can only have six pokemon ready for battle at any given time; you can have more pokemon than that in general, but the rest have to be... stored? I'm not sure how to explain that - it's something to do with computers, but my world doesn't have those so I don't understand the logic.
The pokemon do all the fighting. You can give them items to use during the battle, and maybe tell them what moves to use, but otherwise they do all the work. The battle ends when one side's pokemon are all unable to fight. They usually faint, and you can take them to PokeCenters afterwards to heal them so they can recuperate.
There are eight gyms to a region, and two main regions here: Johto and Kanto. Gym leaders have two kinds of teams: regular and elite. The elite teams are all as strong as they can be, and there are six pokemon you have to fight; otherwise, you'll be fighting three of their pokemon, one after the other. If you and your pokemon defeat all eight gyms, you get something called a Megastone, that lets one of your pokemon grow even stronger in battle, but you can only use those if you're fighting an elite team.
The gyms also aren't the only places where battles take place. There are a lot of trainers along the routes and in the cities, and they tend to consider eye contact a challenge. It's considered very rude to turn them down. That part gets very frustrating.
Sometimes wild pokemon will attack you. If you weaken them without killing them, it's possible to capture them and add them to your team; you catch them with the little balls like the one your Oddish came in. Some pokemon seem to want to test potential trainers first and that's why they attack; others either just want to fight or see you as a threat.