At the time of writing this, the popularity of Pokemon TCG cards has never been higher, bar the original release of the cards
Jumping into TCGs for the first time with Ruby/Emerald might not be the best move, for example, but it's an excellent choice with the right tactics
Jumpstart is my recommendation if youre unsure, but keep in mind that the cards dont have much value for a Standard-focused player
Raging Battle Mouse can't reduce its own cost, even if it's the second spell you cast in a turn
As much as I like to build powerful decks that can have explosive turns, I think there is also a place for decks that are more likely to play a "fair" game and not just win "out of nowhere"
If it didnt draw cards or have an impact once entering play then youre just getting a big body for cheap