It means that even if you lose the card, youll have the tokens left and can still win with them
The individual card styles are designed to take players through Magic history.
One Energy can be attached to a Pokemon per turn, but there are cards that allow you to attach extra Energy and outspeed your opponent
This can be beneficial in certain situations where you want to cast a spell and take an action while it's on the stack, or prevent triggered abilities from your cards from resolving automatically, like using Village Rites with Kroxa, Titan of Death's Hungers ability on the stack
Shiny Holo Rares are typically highly collected, especially when the Pokemon strikes a cute pose or is a rare inclusion in Pokemon TCG sets
This point is somewhat subjective, but Light Pokemon have heavenly, almost angelic artwork for the most part