You were with your Pokémon partner Frogadier and you had just finished a battle and Frogadier started Evolving into Greninja it was surrounded in a light blue light it became bigger and was on two legs and as tall as you it’s tongue wrapped around It’s Face and neck and then went over its shoulder like a scarf it’s body was now dark blue when it finished Greninja was added to your Pokédex “Gre-… Greninja! Nin Ninja!” Your Greninja said happily and it was in a Ninja pose