In the formats where Tinker is legal, its easy to play it on turn 1 and offers explosive potential, whether you're fetching a Bolas's Citadel or Blightsteel Colossus
Its not the baddest beater in the world, but it will demand at least 7 life from opponents to remove, and is a boon to keyword soup decks (which usually feature Odric, Lunarch Marshal or Bloodric)
There are two versions in OP08 meta, one favoring the Fortress strategy where the other prefers cards like 9-cost Roronoa Zoro and 8-cost Rosinante
You could sacrifice a creature an opponent owns if you gain control over it, but this is also a relatively rare occurrence
Now that you know how to play, its finally time to start looking through your cards, build a deck with your favourite Pokmon, and start playing some games