The most important part about Greninja is its "Water Shuriken" abilit y, as once per turn it can do 20 damage to an opponent's benched Pokmon
Having flash gives this card a lot of flexibility too since it allows you to leave up mana for potential counterspells or removal with the option to just flash it in before your turn starts if other actions aren't needed
(Your party consists of up to one each of Cleric, Rogue, Warrior, and Wizard.) At the beginning of combat on your turn, if you have a full party, creatures you control get +1/+0 and gain indestructible until end of turn
Condition markers indicate when a Pokmon has been struck with a special condition
An important note is to keep your cards out of areas that vary in temperature greatly and avoid leaving them in the sun
Closing Hopefully this gives you a clear picture of the rarest and most expensive Pokemon cards of the Pokemon 151 series