AbilityBaby Evolution
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.

Happiny is Pokédex #440, generation 4 (Sinnoh). Happiny is a Basic Colorless Pokémon with 60 HP. The card lists level 5. The card lists Chansey, Chansey (#113) under evolves to.
Happiny sits at 76/127 in Platinum, position 76 of 133. Before it is 75 Grimer, and after it is 77 Honchkrow G. The set belongs to the Platinum series. It was released on 11 February 2009. The printed size is 127. This checklist is longer, at 133 cards. The listed rarity is Common.
Baby Evolution is listed as Poké-Power. 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. The attack Hospitality lists no damage number. Switch the Defending Pokémon with 1 of your opponent's Benched Pokémon. Remove 2 damage counters from the new Defending Pokémon. Weakness is Fighting +10. Retreat cost is 1. The flavor text reads "It likes to carry around a small rock. It may wander around others' feet and cause them to stumble."
Happiny (#440) has 3 other cards in the catalog. Those other cards are in 3 sets. The other printings with a release date run from 2007 to 2019. The earliest other card is Happiny 52/123 in Mysterious Treasures (2007). Both list 60 HP. The rarity there is Uncommon, and here it is Common. Yuka Morii illustrated that card, and Kagemaru Himeno illustrated this one.
The illustrator line reads Kagemaru Himeno. I count 656 other cards in the catalog with that illustrator.
Platinum set binder is where a full Platinum set goes. This card fills one slot there. A generation binder holds one card of each species. Happiny can fill a slot in Generation 4 binder (Sinnoh). Themed lists that include this exact card are Baby Pokémon. I still need this card.
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.
Switch the Defending Pokémon with 1 of your opponent's Benched Pokémon. Remove 2 damage counters from the new Defending Pokémon.
It likes to carry around a small rock. It may wander around others' feet and cause them to stumble.
Platinum, in the Platinum series. It was released on 11 February 2009. The printed size is 127.
76/127. It is entry 76 of 133 in this checklist.
Kagemaru Himeno. The catalog lists 656 other cards with that illustrator.
Common.
Happiny #440, generation 4 (Sinnoh).
Hospitality.