AttackRising Lunge
Flip a coin. If heads, this attack does 20 more damage.

Keldeo is Pokédex #647, generation 5 (Unova). Keldeo is a Basic Water Pokémon with 90 HP.
Keldeo sits at 48/149 in Boundaries Crossed, position 48 of 153. Before it is 47 Keldeo, and after it is 49 Keldeo-EX. The set belongs to the Black & White series. It was released on November 7, 2012. The printed size is 149. This checklist is longer, at 153 cards. The listed rarity is Rare.
The attack Rising Lunge lists 20+ damage. The cost is Water, Colorless. Flip a coin. If heads, this attack does 20 more damage. Hydro Kick is another attack lists 70 damage. The cost is Water, Water, Colorless. Weakness is Grass ×2. Retreat cost is 1. The flavor text reads "By blasting water from its hooves, it can glide across water. It excels at using leg moves while battling."
Keldeo (#647) has 21 other cards in the catalog. Those other cards are in 13 sets. The other printings with a release date run from 2011 to 2026. The earliest other card is Keldeo BW60/101 in BW Black Star Promos (2011). Both list 90 HP. The rarity there is Promo, and here it is Rare. 5ban Graphics illustrated that card, and Naoki Saito illustrated this one. 18 other cards of Keldeo list a different HP.
The illustrator line reads Naoki Saito. I count 270 other cards in the catalog with that illustrator.
Boundaries Crossed set binder is where a full Boundaries Crossed set goes. This card fills one slot there. A generation binder holds one card of each species. Keldeo can fill a slot in Generation 5 binder (Unova). I still need this card.
Flip a coin. If heads, this attack does 20 more damage.
By blasting water from its hooves, it can glide across water. It excels at using leg moves while battling.
Boundaries Crossed, in the Black & White series. It was released on November 7, 2012. The printed size is 149.
48/149. It is entry 48 of 153 in this checklist.
Naoki Saito. The catalog lists 270 other cards with that illustrator.
Rare.
Keldeo #647, generation 5 (Unova).
Rising Lunge (20+) and Hydro Kick (70).