The only Stadium I ever recall being released that interacted with the Lost Zone was Lost World if I recall. Please let me know if there were others. Spoiler: Terminus Cave Trainer - Stadium Terminus Cave Whenever either player draws a Prize card, that card is put in the Lost Zone instead of his or her hand. This card stays in play when you play it. Discard this card if another Stadium card comes in play. If another card with the same name is in play, you can't play this card. Makes you want to think twice about beating an EX with a Delta Dragonite, huh? Nah, just kidding. No EX's in this format, remember?