Some basic tips that I find help me win games
1.Draw cards before you play cards
ex. If you have hau and ultra ball(discard 2 cards, put a pokemon from your deck into your hand) in hand, and know you want to play both, it is beneficial to play hau(draw 3) first in case you draw into the pokemon you want. This also lets you keep better cards in your hand as you have a larger pool of cards to discard from.
2. Play as many cards from your hand as you can before you play cards like Cynthia(shuffle your hand into your deck then draw 7
This will allow you to play more cards in a turn and reduces the chances of drawing the same cards you started with.
3. Wait to play cards like ultra ball until you can play the card they find.
Ex. It’s turn 1, you have a zorua(basic pokemon) on the bench and an ultra ball in hand. Similarly to tip 1, waiting let’s you pick from more cards what you want to discard. Additionally, waiting until turn 2 protects you from cards like judge(each player shuffles their hand into their deck then draws 4 cards).
While there are exceptions to all of these, they are generally true and should help you up your game. Good luck!