First off, this is not like Battle Islands or Battle Ages. You don't build a base and attack when you want. The PVP part is the only part of the game. You basically attack the other players side with units you can spawn. So those who liked building and upgrading ur base, that's not this.
You'll see another avatar appear on screen for the second player once the other controller is activated. This icon will start appearing after getting your around, within the first fifteen minutes of starting.There are a few things you should know about co-op in Let's Go:. The second player will always be the opposite gender of your character. So if you chose to be a boy, the second player will have the girl avatar. The second player cannot interact with or NPCs, and they cannot pick up. They will walk through. The second player can have a follow behind them, and it will always be the Pokemon set to be second in the main player's part.
This second Pokemon is also the Pokemon the second player will use in battle. When playing in two-player mode, you and your friend will fight NPCs two-on-one. When catching Pokemon, if both players throw their Poke Ball at the same time, you will get a catch bonus and a special animation will play, signifying its success. No save data from the second player is transferable to a new game.
This is drop-in co-op and anyone can pick it up at any time. The second player cannot participate in Master Trainer battles.To remove the second player, have them shake their Joy-Con again to despawn the character. If you do not do this the second player character will keep spawning when the main player gets too far away until the controller goes to sleep.