Story...

Mew: (Voice only) The reason of the enraged trio was due to the incident that some sort of ice-type Pokemon caused. In the Unova region, several non-legendary Pokemon got wounded due to the fact that they are now humans and lost their useful powers. Several Pidove, Tranquil and Unfezant fell from the skies getting hurt as they were falling to the ground due to their loss of flying abilities. Several water-type Pokemon almost drowned as they couldn't breath underwater, afortunally Keldeo saved them (As he is a legendary Pokemon which preserved their powers) but most of them got sick. And more more more more more more and very more bad things.

Celebi heard that new and she had no other option than asking another legendary Pokemon. She first tried to ask Manaphy in the temple of the sea in Hoenn.

Celebi: (Knocks the door) Manaphy? Could you open?

Manaphy: (Voice only) Enter here, you are always welcome Celebi.

The big doors of the temple opened. Celebi entered flying. Manaphy waited her

Celebi: Manaphy, didn't you heard that the switch berry bloomed again?

Manaphy: After 100 years, it finally returned. We must know more about this. Phione?Could you help us?

Phione: (Inside her room) (Voice only) Leave me alone (Sob)

Manaphy: Poor Phione, she has been depressed since she was turned in a human. She is also very disappointed to see all those non-legendary Pokemon being forced to be a human. A powerless human. And she fells that is unfair for them.

Celebi: Sorry about your daughter. Can we do something?

Manaphy: Follow me, the library is next to this room.

Celebi decided follow Manaphy. They entered in a room with a huge library of Pokemon books. Manaphy looked for a book.

Manaphy: Let me see, T, here is it. The Darkmere tree.

Manaphy took a gray book with a picture of a tree with black leaves. The berry that somebody ate was in the tree alongside other four berries. Manaphy opened her book.

Celebi: What does it says?

Manaphy: It says: The Darkmere tree, a lethal tree that was originated by a seed that fused with pain, sadness and nightmares thanks to a legendary Pokemon called Obs- better I don't mention it. It just wants to destroy the Pokemon universe.

Celebi: Why we shouldn't say its name?

Manaphy: It is said that if somebody in the Pokemon world says its name, will cause the World-destruction berry to bloom and if somebody eats it, the world will end in 1 week.

Celebi: That horror.

Manaphy: About the switch berry, any ice type Pokemon that eats the berry without knowing what will happen, will cause that the Pokemon get turned in humans and vice versa. There is a secondary effect, some Pokemon and humans can get dispersed in random places in the Pokemon world.

Celebi: Who caused this?

Manaphy: I don't know, perhaps if we ask another legendary Pokemon, we will get an answer.

Celebi: Maybe Raikou, Entei or...

?: (Knocks the door twice) Manaphy?

Somebody was behind the door.

Manaphy: We are here, let me open the door.

As the doors opened, they saw a beautiful woman with purple hair, a blue dress with white spots and a crystal shaped tiara. She was floating in the air.

Celebi: Suicune?

Suicune: Celebi, I was finding you everywhere.

Celebi: Do you know that somebody-

Suicune: Yes, nobody could escape from this problem.

Manaphy: Where are your two brothers.

Suicune: They were kidnaped by the Pokemon Obscu-

Manaphy and Celebi: DO NOT MENTION HIM!- Sorry if we scared you.

Suicune: Don't worry, i forgive you. A dark Pokemon which we musn't say its name, came and captured them. I am alone now.

Manaphy: Do you remember that day? When you and your brothers died in the burned tower?

Celebi: It should have been a very sad day.

Suicune: So terrible. During those last 19 seconds, I was sad of living only 10 years. Afortunally, that rainbow Phoenix bird came and revived us in form of powerful legendary Pokemons..

Manaphy: Do you know who turned us in humans.

Suicune: Not exactly, but we may ask Arceus. Forget it, he may be asleep.

Celebi: It was an ice-type Pokemon.

Suicune: Wait, now I remember. I felt that it was an ice-type Pokemon formely found in Hoenn.

Celebi: Really? We should go to Unova and say that to the Landorus.

Mew: (Voice only): And they did. Celebi, Manaphy and Suicune went to Unova and explained all to Landorus. He tried to find the responsible of this. But he is not the one that is causing this storm. He is currently unconscious since a tree fell down and hit him Then, the ground vibrated too strong causing too many rocks to fall and destroy the two monuments that keeps the other two Pokemon away. Now they are here in Kanto, destroying everything.

End of the story...

Snorunt: (Worries) (Thinks: An ice-type Pokemon from Hoenn?)

Cophish: So, not the entire trio is angry.

Tangela: Wait a second, and the earthquake?

Cascoon: The storm and the wind combined are very strong, and don't forget the earthquake of the beginning.

Mew: (Looks at Lucario's red eyes and floats to him)

Lucario: Eh, Mew. Why are you staring at me?

Mew: You remember me to the Lucario that sacrificed himself to save my life.

Lucario: Mew, I know how painful is to loose a friend.

Mew: I'm still sad.

Pikachu: By the good side you still have Bonsly to play.

Jigglypuff: Blah blah blah, can we go outside to find those human birds?

Clefairy: We must stop this storm first.

Jigglypuff: I want to get out now!

Clefairy: Not without a solution!

Jigglypuff: (Runs to the entrance of the cave)

Clefairy: (Catches Jigglypuff) Stop! Do you want to catch a cold?

Jigglypuff: I just want to be a Pokemon again.

Mew: Stop fighting! We will solve this soon.