ash and friends spot a spaceship about to hit the ground origianlly thinking its a shooting star and find a cleffa that is fallen out which becomes friends with phanpy. they find out it is the spaceship from an earlier ep and we meet the pokemon mystery core who want the cleffa and even team up with team rocket but there plan fails. ash and friends get cleffa back to the clafairy and it evolves in time to get it on the ship.
next time a odd evolution.
Harrison’s world 