Tokens, cards that aren't meld cards, or meld cards that don't form a meld pair can't be melded
It can be played in a handful of decks because of Earthen Vessel, and many types of Energy acceleration, which means a bunch of different decks have the option to include a Pokemon that can prey on single Prize Card Pokemon
My inbox was flooded with fun comments and commission requests
But for only 1 mana, that card is going to be the best, highest quality card your deck has to offer, possibly netting you a lot of card advantage through a board wipe, stopping someone else from doing the same to you with a counterspell, or setting you up to complete an infinite combo
Brothers Yamazaki allowed you to have two of the same legendary creatures in play at the same time