The wind ruffled the tall grass in Pallet Town. 

Blue (female) was running from the direction of her house towards Red's.  She didn't run with a smirk on her face, which usually happened when she saw a ship moment in between the Dexholders. This time, it was really serious; no smirk, no camera on hand, just running as if The Masked Man were chasing her.

Her hair got stuck in her mouth, but she didn't mind. She had to get this information to Red. And soon. 

Once she reached his house, she snuck in through the window, knowing Red might think it were another of her ship moments caught on camera. Not this time. Or any time later on.

Red was lying on his bed, reading one of Pokémon Battle Encyclopedia books. Volume XVI, to be exact.

"B-blue? What are you doing here?"

"Red, this is serious. Turn on your TV right now." She was grabbing him by the shoulders by now.

"O-okay. But why?"

Blue reached for her bag, pulling out an envelope. She pulled out the letter that was in it.

TUNE IN TO THE PHANTOM CHANNEL MONDAY AT NOON

-TRR

"Red, do you know what the Phantom Channel is, right?"

"Of course! It was every kid's nightmare! They say that channel 99-9 is being controlled by a long-gone ghost from the Lavender Town Tower! But why now?"

"Well, it's two minutes until noon, so why don't we find out?"

While Blue was doing the legendary trick to tuning in to the infamous channel (tuning in the radio to a certain station), Red was thinking of what could happen. And why would they send the message in a letter? Isn't that a bit too old-fashioned nowadays?

"Bingo."

The TV screen started flickering and blinking, until the screen revealed a fuzzy silhouette. It was too dark to figure out what it was. Or who.

"Ha ha ha! You must be Pokédex Holders if you're watching this. It's been a while. Now you may be wondering why you're here. Consider this as a farewell. We'll never see each other again, because TEAM RAINBOW ROCKET will take over the world! There is no possible way that you could stop us!! Notice that I said "us". That's because ALL OF THE EVIL ORGANIZATIONS OF THE WORLD will come together in one place and take over the WORLD!!!"

"No..."

"Oh. And just one more thing...Your little friend, or BROTHER, Senior Blue, is going to join us. No matter what you do, IN THE END, he will become the heir for KING OF THE WORLD. MUAAHAHAHAHAHAHAHA!"

The screen flickered and buzzed once more, and the TV turned off. Red had turned it off using his remote.

"Blue...Team Rocket has come back...TELL THE OTHER DEXHOLDERS!"

A while ago, Professor Oak had installed a new update, enabling a private radio station built into every one of the current existing Pokédexes; from Kanto to Alola.

"Attention all Pokédex holders! This is an important announcement from Senior Blue, the Third Pokédex Holder!"

Kalos region:

"Hey, Y, your Pokédex..."

"Team Rainbow Rocket has come! We have an important meeting to discuss about it this Saturday!" the speaker said.

Shauna knew that she, Tierno and Trevor weren't Pokédex holders. It called for Y-ey and X-ey, not them.

"You guys should go. They called for you for a reason."

"Shauna's right. Let's get our things together, X."

Johto:

Silver was flying over to Gold's house when he took a look at his Pokédex. He was slightly startled when he heard his sister's voice.

His mind wandered to last night...

That night, Blue came to visit him.

"I know you're worried about your dad, but what can he do? Maybe he wants to take you on a vacation! Ooh! Now that I think of it, I should invite Red and the others to the Pallet Town Beach! Although we might have to wait because Yellow's still training in Alola. Anyway, I just think he wants to spend some time with you, even with all his work and stuff."

"Yeah...maybe you're right. He's my dad, after all."

"It's way past your bedtime, Silver! Let me get you tucked in."

As Blue made sure Silver was comfortable in his bed, he smiled, because he remembered when Blue used to do that to him during his time with the Masked Man. He smiled at the thought.

"Silver, you ok?"

He snapped back to reality.

Gold and Crystal were holding up their Pokédexes too.

"Lets grab some tickets for the Magnet Train tomorrow morning." Crystal said.

Sinnoh:

"Diamond, Pearl! Look at this!" Platinum was getting her nails done in her home spa.

They immediately rushed over to see what was the matter. 

"A Pokédex Holder meeting...That sounds official to me." Pearl said.

There was a moment of silence, suddenly interrupted by Diamond munching on Platinum's cookies.

"Diamond, please. Your spilling crumbs all over the floor. At least get a napkin or something."

"Sorry m'lady."

"Anyway, we'll book flights for Kanto first thing next morning."

Every other Pokédex holder around the world were preparing a way to get to Kanto by Saturday, or the next day.

And then, the day came.

Red, Blue and Green waited in Vermillion Airport for the first flight to come. Apparently, the first Pokédex Holders to come were Platinum, Diamond, and Pearl.

They were easy to spot.

A crowd formed around the rich girl who stepped off her private jet, with two boys following right behind her.

"So, you're supposed to be the Sinnoh Pokédex holders?" Green asked.

"Yes, we are. My name's Platinum and-"

"We're Diamond and Pearl, a duo of comedians, destined to become the best of the best comedians in the world!" both Diamond and Pearl said and the same time.

Red and Blue smiled in respect, but Green did not seemed amused.

"Guys! Please! We came here for a serious matter!" Platinum shushed the both of them.

"Senior Red! Senior Blue! Senior Green! Long time no see!"

Emerald, Ruby, and Sapphire ran towards them.

"Hey everyone! We're still waiting for the rest of the Dexholders to come."

After the Hoenn Pokédex Holders arrived, the group decided to snack on something, to Diamond's delight, when the Unova Dexholders arrived, and then the Kalos Dexholders; X and Y were happy to see Green again, Gold told Red that they were going to wait for them in Prof. Oak's lab, and the last Dexholders remaining were Yellow, Sun, and Moon.

It was almost 3:00, and Red was about to call Yellow to make sure everything was okay, when none other than Sun, Moon, Yellow, and former Elite Four member Lance stepped off of their airplane.

"Great! You guys are here! Oh, uh...Hey Lance!" Red felt really awkward. This was the same person who was responsible for attempted mass genocide in Kanto long ago.

"Good evening, Red."

"I'll explain how I met up with Lance and the Alola Dexholders later. Right now, our main priority is making sure Team Rainbow Rocket isn't a threat to the world.