There are four adventuring classesWarrior, Wizards, Rogue, and Clericand you can form a Party by having one creature of each of those classes on the battlefield
Just like that Eevee, this Eevee with the Boosted Evolution Ability can ignore standard Evolution rules and evolve during the turn you play it
It doesn't copy whether that creature is tapped or untapped, whether it has any counters on it or any Auras or Equipment attached to it, or any non-copy effects that have changed its types, color, power and toughness, and so on
Other permanents can have subtypes that define mechanics of the cards
ProTip: Be careful buying Pokemon Cards online there are loads of fake cards out there for older kids who are really collecting cards and interested in card values make sure you buy from a good retailer and skip those cheap mixed sets of Pokemon cards like the ones on Amazon