yugioh card in hand limit Yu-Gi-Oh! - Summon (LODT-EN079) - Light of Destruction - 1st Edition Hand - Yugipedia

If you do so, you risk incurring penalties, including being disqualified and removed from the event

Not because they aren't strong enough to keep up, but because the wording on the cards directly conflicts with how the game is played in modern times

Pikachu happens to be one of the poster-children of Pokemon so it definitely has more prints than a lot of cards, but even if you imagine 10% of that as an average per Pokemon (14 variations, or 5.5 prints) and multiply that out by the number of Pokemon presently in the franchise (721) youre looking at ~10k cards with variations or ~4k unique prints

MINI SIZED : Sized to fit all of your favorite mini-sized (Japanese) card games