There is no shortage of cards in the deck with triggered abilities like Arabella, Anim Pakal, and Krenko, and Agate Instigator
Force of Will (8.5) is obviously the premium in hardness and cost but you have to have sufficient disposable blue cards in your deck to have it be any good and that is a little harder to do than it sounds with so many combo pieces in your list
This uncommon works well with lots of small, low-cost characters, since when you play him, all your other cards get an extra two strength for the rest of the turn
10 Island
Ahead of the player waiting for a lot of interesting things, so do not be bored
The practical answer: start with Pokemon 151 Pikachu AR if you are new, use Pikachu V-UNION if you want a modern Japanese centerpiece, and treat Pikachu Illustrator as historical context rather than a normal shopping target