This one works with Auriok Salvagers, which allows you to return Lion's Eye Diamond from your graveyard to your hand
Genetic Apex, the first Pokmon TCG Pocket set and the only one currently available, is labelled as A1 in the game, so A2 is presumably the second full set
Drawing an extra card every turn is always valuable, keeping the momentum up and increasing the chances of finding key cards
If damage that can't be prevented is dealt to the target creature after Gatta and Luzzu's last ability resolves, you still put that many +1/+1 counters on it
The only downside is that it has a costly Retreat Cost, which means you might lose a point while doing setup
As long as the Active Pokemon has the Energy required to perform one of the moves listed, then it can attack the opponents active Pokemon