Supertypes (Pokemon/Trainer/Energy) One thing that I've found almost universally common is that the main order is: Pokemon, then Trainers, then Energies
The fact that it returns the creatures to play rather than regenerating them is huge, as it allows decks to be built around exploiting the death triggers of cheap creatures
Unlike Caterpie, which is limited to Grass-types, Combee can summon any Basic Pokemon, making it an excellent fit for any deck due to its one Colorless energy requirement
Sometimes, promo cards are used as prizes for contests held by The Pokmon Company, such as illustration contests, or competitive Trading Card Game events like the annual Pokmon World Championships
The one-damage pings can add up quickly, and like Dancer's ChakramsDancer's Chakrams, this can survive normal creature wipes and go back online pretty quickly
Dugtrio requires just one Energy to deal 40 damage, and if you happen to get heads in the following coin flip, your opponent wont be able to attack you whatsoever