>>29474186A Pokemon's weaknesses aren't the main reasons why a Pokemon is bad, it has more to do with its stats, movepool and ability. Tyrantitar has 7 weaknesses, including a 4x weakness to fighting, yet its consistently been one of the strongest Pokemon in OU. Anyways, I think Decidueye is described to have blazing speed and possibly good attack, so I think it'll be a good sweeper or pivot.