I don't' own Pokémon or Undertale. They belong to their creators.
"And with that ladies and gentlemen! Ash Ketchum is the new Sinnoh Pokémon Champion!"
I finally did it! I became a Pokémon Champion. My Pokémon and I did it! My dream is closer now has been achieved thanks to my Pokémon and my friends help!
"And with that ladies and gentlemen! Ash Ketchum is the new Kalos Pokémon Champion!"
Yeah you.. wait what? What's Kalos? Isn't this Sinnoh?
"And with that ladies and gentlemen! Champion Cynthia remains the Champion of Sinnoh!"
What is going on?! Then suddenly everywhere around me turns black void.
"What's going on!?" I hear footsteps coming towards me.
I turn around and see.. a man wearing a mask that frowns with a red cloak (Chaser John Doe outfit). I reach for my Pokéballs, but only to see nothing there. My Pokéballs are gone and so is my backpack.
"No need to be alarmed." It says.
"What are you!?" I scream at it.
"I am Killua." It presents itself.
"Where am I!? Where are my friends, my Pokémon!?" I question it.
"We're in your mind. And your friends and Pokémon? Well they never existed." He says evenly.
"What?! You make no sense! They exists! My adventures are proof of that!" I say getting frustrated.
"Your adventures? Oh you mean your dreams." He answers his own question.
"They're not dreams, they're real!" I argue.
"Are they really? Ash pay attention! You've went through 5 regions and you're still ten! That should've taken you years!" It retorts to me.
"But the pain I felt-" "Was Arceus' doing." What.. Arceus?
"What do you mean?" I ask in confusion.
"Arceus was the one doing this! In fact she's the reason you're in a coma!" No, this isn't true.
"It is true. Surprised? I'm in your mind! I can hear your thoughts. So Ash, want to hear the truth now?" I nod.
"Well here it goes. Arceus wanted the "Chosen One" to hate Team Rocket so he can have a motive to take the team down. She influences Giovanni to attack Pallet to take some research but told his grunts not to attack the inhabitants. But an admin disobeyed and laid fire to half of Pallet. 30 people were caught in it, including you and you mom."
Wait!? My mom?! "What happended to my mom!?" I question it.
"Out of the 30 people... only 1 survived. You know what that means?" No.. no no no. She can't be..
"Please tell me you're lying." I ask it solemnly.
"It's true Ash she's dead." I choke. She's dead.. dead.
"So I'm stuck here." I ask it hollowly.
"Well, you could be stuck here until Arceus thinks you're ready. Or.." He draws out.
"Or what?" I ask.
"Or we can make a deal. You let me stay in your soul for a while and I take you out of your coma. So is it a deal?" He asks.
"It's a deal." I respond.
Then everything goes white.
Real World
"Well Gramps, my Pokémon journey is going to start in a week." Gary starts a conversation with his grandpa.
"Yes it is. Now that you're 14 you can start you're Pokémon journey." Oak replies while working.
"Yeah it is, but I was hoping Ash was out of his coma. I was hoping me and him can be rivals. It doesn't seem to be coming true though." Gary solemnly says."
"Yeah that boy had potent-" ring* *ring* "Huh." Oak looks at the computer screen.
"It's from the hospital." Oak tells Gary then picks up the phone.
"Hello? Ahuh." Then turns to Gary
"They say it's about Ash." Oak tells Gary in concern.
"Ash huh? They're probably calling about his condition or something. It would be nice for once if they called and told us that-" Gary is cut off by his gramps yelling "Ash is awake!?"
"Yeah it would be nice if they called us telling us he was awake. You didn't have to yell though." Gary told his gramps.
"No you idiot he is awake!?" Oak yells at Gary
"What?!?" Gary yells.
They said he woke up ten minutes ago!" Oak tells Gary.
"We have to get to the hospital now!"Gary exclaims.
"Right behind you!" Oak adds.
The Pokémon in this world will have both beast forms and Anthro forms. Ash will have no idea of Unova or Kalos. Also the Chaser John Doe thing is just for his outfit. The anime itself won't make an appearance