Here's why:
* Stadium cards are considered "field" cards - They don't belong to a specific player and are placed in the middle of the playing area.
* There are no cards that directly search for field cards. The game mechanics are designed to focus on searching for cards in your deck or hand, not the field.
However, there are some cards that can indirectly help you find Stadium cards:
* Cards like "Professor Elm's Lecture" or "Professor Oak's New Theory" let you discard your hand and draw new cards. This can indirectly help you find a Stadium card if you happen to draw it.
* Cards like "N" or "Judge" can force your opponent to discard their hand, potentially exposing a Stadium card they may have been holding.
Remember: The best way to get a Stadium card into play is to simply draw it from your deck or use a card that allows you to search your deck for a specific card.
Hope this helps!