In the current format, there are numerous ways to return Pokmon to the hand, and this is usually a great way to remove damage from the board and stop the opponent from taking prize cards
If youre in for the long haul, not having Mew in your decks wont significantly impact your gameplay
Also, it isn't a Standard MTG set
McDonald's has long capitalized on the success of the Pokmon franchise by releasing collectibles in their Happy Meals, including gold-plated metal cards, toys, and, most famously, cards from the Pokmon Trading Card Game
Since creatures matter so much for this mechanic, cards that remove permanents or otherwise impact the board tend to rank higher than those that don't, though the Court cycles are very strong since they play well with board wipes