As you enter the town, someone is sure to tell you about where you're located - a common staple of many video game RPGs
It can be any Energy and any Pokmon, regardless of their type, which is quite nice because a lot of similar cards from the past restricted what type of Energy you could attach or what type of Pokmon you could attach it to
The most controversial, yet most popular Secret Lair release at the time, The Walking Dead was the first crossover to feature unique custom card mechanics instead of reprints
This is both an advantage, since it can attack from many angles, and a disadvantage, since token production, direct damage, and artifact & land destruction push it in different directions
Real example : When a new deck archetype wins a major regional tournament, every card in that deck list sees immediate price increases