First, we should know that these cards were made as part of the Pokemon Trading Cards game, but due to their popularity and good investment returns, apart from players of the game and collectors, also people with investment in mind have emerged
I put a copy in the front window so the original doesn't get damaged
The bonus from Gran Pulse Ochu's last ability is determined at the time it resolves
You can't destroy Stardust Dragon with a card effect, but you can Brian Control it and use it as a Synchro Material
The tighter the sleeves fit the cards, the better they will function
However, Duel Monsters would soon gain increased prominence in the original manga, and the card game would soon be the sole focus of the franchise, throwing the original "multiple games" concept to the wayside