Firsy you have 2 beat rayquaza in sky tower and watch the credits Then u go 2 whiscahs pond north of the poke squrae and talk to alakazam After u r done go 2 ur team base or visit a team member and your partner will ask u if u want to change leaders at willsay yes and put ur partner on standby and go in the hole in whiscahs pond and a plant will ask u if u want 2 evolve say yes