A Basic Pokemon Card of type Water with the title Misty's Staryu and 40 HP of rarity Common from the set Gym Challenge.  It has the attack Star Boomerang with the cost Water, the energy cost 1 and the damage of 20 with the description: Flip a coin. If heads, return Misty's Staryu and all cards attached to it to your hand. (Either way, this attack does its damage.) It has weakness against Lightning 2. 
Misty's Staryu