Once during your turn (before your attack), you may put Chansey from your hand onto Happiny (this counts as evolving Happiny) and remove all damage counters from Happiny.
This card was included in the Mysterious Treasures expansion with artwork by Yuka Morii, first released in the Japanese Secret of the Lakes expansion. A Reverse Mirror Holofoil variant with a "Diamond & Pearl" stamp was released as part of a Burger King promotion in July 2008. This card was reprinted in POP Series 8 with different artwork by the same artist. The Japanese version was released through a Meiji Chocolate promotion in July 2007. A promotional version of the Mysterious Treasures print with a gold foil snowflake stamp was one of 24 cards released in the Pokémon Countdown Calendar in October 2008. A Cosmos Holofoil variant of the POP Series 8 print was also made available as one of two cards in the Arceus Two Pack Blisters, released on November 4, 2009.