Throne of Eldraine introduced the idea that a Vehicle could create tokens when it entered to crew it
They are really hard to pull, but even then, some of them might not be rare in terms of price, as these are determined by various factors such as the art, the usefulness, or the Pokemons popularity
As an added bonus, you can even stack two of these on top of each other, or besides each other, to double or quadruple the amount of decks you store, while still maintaining a professional look
The archetype also has the capacity to make additional in-theme or non-in-theme Fusion monsters, such as "Mysterion the Dragon Crown", "First of the Dragons", "Quintet Magician", and "Dark Magician Girl the Dragon Knight"
Often yes, due to lower print runs and earlier releases