Creating a pokemon team can be tough. You need to have a good team that can be aggresive, defensive, speedy, and even annoying. But, since you can only have six pokemon you have to choose wisely. On rare occasions, you choose a pokemon for fun. Pikachu, Aron, Magikarp, etc.
Here are some example teams I made. Lapras,Pikachu,Blastoise,Moltres,Dugtrio,Dragonite. Shedinja,Dragonite,Lapras,Garchomp,Charizard,Tyranitar. (Joke team) Magikarp,Pichu,Chatot,Aron,Burmy,Bidoof.
You have to have 2 attackers, 2 defenders, 1 speedy, 1 annoying.