Aerodactyl, Kabutops, and Omastar return in better form, and the set experiments with reactive abilities, such as cards that trigger from being knocked out or damaged
For abilities, I chose 'Psychic Type' for the "Puppy Eyes" ability, because Richy had a way of making me feel guilty whenever he looked at me while I was eating
Artifacts Okay, not actually a color, but I wanted to point out that artifacts already have carte blanche to do discard effects (a la Disrupting Scepter)
Of course, there are more complex strategies and guides to follow, but this is all you need to know to get started playing the game
With this way of spending duplicate cards, it would be easier to collect all the more rare cards in each set