Chaos Gym   (#102,  Gym Challenge)
Type:   Stadium
Rule:  This card stays in play when you play it. Discard this card if another Stadium card comes into play.
Text:  Whenever a player plays a Trainer card other than a Stadium card, he or she flips a coin. If heads, that player plays that card normally. If tails, the player can't play that card. If the card isn't put into play, the player's opponent may use that card instead, if he or she does everything required in order to play that card (like discarding cards). Either way, the card goes to its owner's discard pile.
Rarity:  Rare
Artist:  Keiji Kinebuchi