>>34576542>getting into tournamentsReally easy. Go into a tournament with one of those preconstructed decks and get smashed but take note of every deck in the hall.
Next time you come, just order the deck that has an advantage against the majority of the decks there.
>get into LGS>buy the decidueye deck>literally fucking everyone plays Gardevoir>buy metagross>every weekend win $40 in prizes from a $15 entry