During your Main Phase: You can Special Summon 1 monster from your Deck that specifically lists the card Golden Castle of Stromberg in its text
This strategy is actually very good to find Rare Candy and even Stage 2 Pokmon
These force your opponent to discard a card from their hand, and while this might not appear all that powerful at first glance, repeatedly forcing your opponent to discard cards or being able to choose a specific card from your opponent's makes discard effects worthwhile
Not other fake cards
If the collector number starts with an SH, then the card is considered a Shining Pokmon. The artwork for this card is different than the standard version, and the card is also a reverse holographic card
I know it's honestly too strong a card, but personally, thanks to this, I can think of various unique decks for him, so I'd like him to settle down to a semi-restrictive level