Random, but did you know that Pokémon were originally based on the bugs and animals that the satoshi tajiri saw. He decided to make his own and put it under various archetypes and skill factors.
Fire, water, psychic, dragon, poison, steel, ground, electric. Grass, fairy, flying, bug, ice, rock, normal.
(Those are the basic list )
Each has their own skill percentage or point deduction + or skills that can be added, each card is put under a class, or legacy. Or even something else entirely. But this also has a secondary angle to it.
If you get rare cards, the higher classes get interesting. Golds, Silvers, Shinys, Legendaries, EX, GX, Tag Team. They have point boosters and cards that can be boosted to use in pokemon card battles, and can take double if not quadruple damage over a typical card.
(I’ve been Collecting Pokémon cards for a little over 10 years now….)