Mew

Mew is the one that chooses you and your friends to save the pokepark. He is the best pokemon at Bulbasaur's Daring Dash. Mew is the last pokemon you will need to befriend to save the pokepark. Beware: He is not easy to defeat. He plays three skill games with you: Obstacle Hop, Battle, and Chase. Mew's obstacle hop is the hardest in the whole game. Mew changes into three different pokemon when battling: Round One: Magmotar. Round Two: Garchomp: Round Three: Tyranitar. Then on to Chase. Mew is one of the fastest pokemon in the game. So it might take you a while to catch up. (If you didn't go to Ponyta and get your dash maxed out.) After you win the game you can keep going to the Sky Pavilion, where Mew lives, and keep playing skill games with him. But beware: he is extremely hard to defeat after you are already friends with him. If you manage to defeat him that second time, he will become a best friend!