"The first thing we wanted to tell you is... That we're really sorry for you, we know you've been betrayed and because of that, we decided to follow you in your journey to become stronger and prove them wrong" Arceus said, which made Ash smile, knowing that the Legendaries believed on him.

"Thank you Arceus, I really appreciate it, I really need help to become the strongest, but with you helping us, I can say for everyone that we're flattered" He replied, but his surprise wouldn't end there.

"Now the second thing Ash, and I think you'll love this one, is that you are the son of Me and Mew and that you can transform into a Pokemon. Also, your friends can also transform into a Pokemon, but you and your friends only have 1 chance, so be careful and choose wisely" Arceus said, and he was right when he said that Ash and his friends would love that.

  "Really?! Cool! So then, which Pokémon should I choose... Hmm, I know, I want to be a Mewtwo!" Ash said with enthusiasm.

  "I want to be a Groudon, Arceus." Gary said with excitement.

"I wanna be a Zygarde like Squishy!" Bonnie yelled as she was now with the Zygarde Twins.

  "I'll be a Raikou" Clemont said with a smirk.

  "I... I..." Serena said with confusion, but then she glared at Ash and nodded. "I want to be a Mewtwo as well!" She continued as she fist pumped the air in excitement.

So, Serena chose to be a Mewtwo along with Ash! Find out what happens in the next chapter!