Eight mana for, at minimum, three 5/5 lifelinking fliers swinging in and three permanents from your graveyard, is an absurd rate
While this doesn't affect value, it adds personality to the card and can help with identifying which specific printing of a card you have, as different printings sometimes use different Pokedex entries
In this case, Epic Struggle is your win condition, and cards like Folk Medicine and Symbiotic Deployment help you get there
Since ex cards are considered Basic Pokemon, being able to put it and all attachments back into your hand can mean the difference between winning and losing
Once I found that group, I began to mail cards to many artists, as well as the (at the time) two big agents who repped various other artists, he said
For casual play, bears are decent enough that you can just do that