rivals ixalan booster box Magic: The Gathering of and eternal life Rivals of Ixalan - Booster

Some comes from MTG literature

In an announcement on its website, the Pokmon Company said the pack would be the first pack to get a simultaneous worldwide release, "allowing fans across the world to enjoy collecting new cards at the same time." The expansion pack will be unique in other ways as well, as every card in the pack will be a foil card, including the Basic Energy cards

Not only is their life as toys a direct reference to the Transformers toyline but their designs also resemble some of the more popular characters from the series

That has a point with Wonder, you have to agree that its nice to grant flying to all of your beatsticks