TCGenius.aiThis card stays in play when you play it. Discard this card if another Stadium card comes into play.
Once during each player's turn (before attacking), that player may flip a coin. If heads, that player chooses 1 of his or her Evolved Pokémon in play and discards the top Evolution card from that Pokémon, devolving it.
Undersea Ruins
Aquapolis 138 · Trainer · Stadium
StandardNot legal
Regulation marknone
RarityUncommon
Standard uses regulation marks H and later, plus identical reprints of legal cards.
Released January 15, 2003.
Price history & alerts
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Build with this card
The Pokémon deck builder checks every deck against the Standard rules, and Genny can build one around Undersea Ruins.
Open the deck builder