Its always a struggle to find that line between Casual and Powerful. These are reasonably strong pre-cons that are in the Goldilocks zone of not too strong for casual and not too weak against focused decks
You can easily find card sleeves specifically designed for Pokemon cards in various sizes, styles, and colors, allowing you to personalize your collection while keeping it safe
The popularity may have fallen in recent years, but it is starting to climb back up
Gau's last ability checks at the moment it would trigger to see if a card left your graveyard this turn
A brief refresher, as even experienced players tend to have issues with Protection: "Protection from X" means "this card can't be damaged, enchanted, blocked, or targeted by anything that is X." This means a Silver Knight can eternally block a Goblin Goon and can't be hit by Lightning Helix
Because the permanent is on the battlefield both before and after it's turned face up, turning a permanent face up doesn't cause any enters-the-battlefield abilities to trigger