Holo cards will easily scratch, Penny sleeves will prevent this from happening
The best creature type is hard to define, but some metrics can be used to narrow it down: If youre looking for creature types that make good creature-focused (i.e., typal) decks then you probably want goblins, humans, or elves
Its super important that you check your cards , however, as youll notice that the same Pokemon types can have different weaknesses in Pokemon TCG Pocket
Generally, having more life is better than having less life, but you do not lose the game until your life total reaches 0 or less
Heres a tier list of every Ogerpon card currently in the franchise, ranked from worst to best