Watch 2016 World Champion Wolfe "Wolfey" Glick guide you through competitive teambuilding
Confused about Pokémon breeding, or feel like you don't know enough? Check this out
Our first project, come check it out for good sets and rulings here
Courtesy of Pokémon Showdown, check out this highly detailed and accurate calculator here
Pokémon Database has this feature to show your moveset's overall coverage against other Pokémon; try it for yourself here
Reality is we can't cover everything, but if we don't know something then they just might. Aren't sure? Look here