Structuring a team is the most important part of Pokémon battling. Your team needs to be catered specifically for your style of play, and there is no right or wrong way to structure a team if it works for you.
Some players prefer all out offensive teams with three powerful offensive Pokémon of special attack, and another three of physical however these teams, while dangerous, can sometimes suffer from being shut down by a more tactical team with more balance.
My personal recommendation for the ideal team set up is to have:
The Lead is the first Pokémon that you send out, and you’re best off picking it based on the rest of your team. You want a lead Pokémon that’s able to start the game off to your play style.
The Sweeper is the position that ideally you would want at least one of your Pokémon to hold, while all of your Pokémon should have some offensive capability, the sweeper is the Pokémon that’s meant to hit hard. I would advise two sweepers, one physical and one special, however it’s your call.
The Wall is your defensive Pokémon, ideally with defence so high that it can take a hit from a powerful sweeper as though it’s nothing. It’s common to see a physical and special wall on a team.
The Wall Breaker exists to… you guessed it, break walls. A wall breaker doesn’t have to be as fast because it exists to defeat slow Pokémon. What it should have is decent attacking power in both its physical and special attack, so that it can hit hard with both. This means that your opponent can’t switch out to another wall safely as both of their defensive Pokémon are in danger.
The Annoyer/Support is a role that can sometimes be filled by the lead, or by your wall but it will generally do things to support your Pokémon by either healing them, or by making it more difficult for your opponent’s team to damage them through status moves.
These are my personal recommendations and I will break down each one in more detail to give you a better idea of how to make use of these roles. So join me next time when I will be breaking down the ideal lead!