Day 1 (Ash kills pikachu)
Ash and pikachu are stranded in the middle of a jungle island with inedible fruits (they tested it on Ash's other Pokémon). Now only Ash and pikachu remain, yet they both do not want to die. What can be done? There are 2 options. 1. Ash slices pieces off of himself for food or 2. Ash kills pikachu to eat. So of course being the greedy human he is, Ash kills pikachu. As he tears off pieces of his dead comrade, he realizes 'oh no! I have to save this meat otherwise I will die before help comes' so Ash eats only the tip of pikachu's tail on the third day (since he got to the island).
Day 1 (post pikachu death)
The next day, Ash sets up camp in a clearing in the jungle. His camp is near a water source (lake) and he has decided to make a fire (so he can cook his meat). Unfortunately Ash is kind of going crazy due to being all alone in the jungle for about 4 days (not including today), as such he is now talking to himself. "Okay what do I need next, after fire? Hmm I think I need some ice, because otherwise my meat will go bad!" So after eating some more of pikachu's tail, Ash sets off to find some ice. Suddenly, Ash sees an ice type Pokémon floating(?) around. His eyes shining, he pounces on the Pokémon grabbing it immediately. "(In a high pitch voice) Hey! What are you doing? You savage!" "Meat or ice? Meat or ice? Ahahahahaha" Ash laughs maniacally. "(Still in high pitch voice) you're a crazy maniac! Get away from me!" She(?) yells at Ash while creating ice around Ash. Ash, noticing the ice, immediately kidnaps the ice type Pokémon and runs back to his camp. "Lala lala la, I got some ice! Now my meat won't go bad!" He chants savagely as he locks the Pokémon up with chains that magically appeared near him. Afterwards he went to sleep.
Day 2 (post pikachu death)
"I miss my friends. I need my friends. SOMEONE HELLP MEEEEEE! I need help. Someone, save me." Ash is now beginning to go completely crazy "(in the high pitched voice again) if you need someone to talk to, you can talk to me." Says the ice Pokémon. But as the author I say that, that would be very boring as a story so naturally Ash refuses "no no no no NO NO NO NONONONONO!" "(In the high pitched voice) okay man! You don't have to be so violent." The Pokémon says as she(?) watches Ash lose control and eat the rest of his meat. He starts from the tail, eating up to his butt when he gets there, he doesn't stop and he tears into the flesh, ripping a huge hole in the bottom of his dead companion's corpse. From there he eats the organs, starting with the intestines, not even leaving a single bit left of the organ, he then moved upward, like a rabid dog, continuing on to the spleen, the liver, the kidneys, the diaphragm, not even leaving the bladder. Once he was finished none of the organs were left, and only the outer shell of pikachu remained. Ash hungered uncontrollably and continued eating, starting at the head, he then eats it all, including the brain, leaving only pikachu's blush. After he finished the head, he tore bits of flesh from between the corpse's ribs, not even caring about the dried blood splattered all over the corpse from when he killed it, nor about the fresher blood splattering all over him. He was ravenous, and nothing would stop him from eating, not even realizing it was his best friend he was eating. When he was finished he looked at the corpse, all that remained were the red things on pikachu's cheeks some bones and a blood splatter. Coming back to his senses he looked at the corpse and began crying "what have I done?" He got out through sobs "I've eaten my best friend!" He wailed, and after that his mind shattered and he started laughing. He picked up the red things from pikachu's cheeks and stuck them on his face, making them stick with the dried blood, then he turned around to look at the horrified ice Pokémon with a glint in his eyes. "(In a higher pitched voice) AAAAAH! Please don't kill me, kind sir!" "Finally! AHAHAHAHAHA! Finally, I have taken over this body of his. Fear not, for I will not eat you now, but later I shall. AHAHAHAHAHA!" With that he freed the ice type and leapt from the ground with an inhuman speed the boy couldn't possibly have had while laughing. That's the story of Ash the pikachu killer, now kids (who I assume are reading this) go to bed!
THE END
A/N: just so you know, I only wrote this 'cause I was bored and my friend suggested it. Also I have never actually watched Pokémon or had any other kind of connection to Pokémon. So if you don't like it or it doesn't make sense do not murder me, same goes for if I got anything wrong. This is a one shot. Probably.