Pikachu stir from his slumber, fluttering his eyes open. Something amiss, his master Ash not sleeping next to him and he is not sleeping on a soft bed. Instead, he found himself sitting on a cold metal bench. Eyes wide as a saucer, heart beats like a concrete drill. Looking around the place, he concludes he might be in a lab. Two scientists bearing the Team Rocket emblem on their coat, denote that he is indeed captured, but how? Before he could remember anything, a sharp pain from a needle with questionable content greets him. He so wants to fry them, but not quick enough from stopping them injecting the serum into him. Muscle tearing and bone cracking, unbearable pain and soon he passes out.
Soon consciousness has returned to him. Again he found himself in a new setting; three sides concrete wall and one side metal bar with a Meowth overlooking. Wait, a Meowth, not just any Meowth, but the notorious one. Pikachu seethes with anger and rush in to attack Mewoth, but only if he would be mindful of his new body, as his new longer legs spring him further than he needed and he faces plant himself on the iron bar. Earning a laugh from Meowth.
Meowth: Pis'fff…You up! Pis'fffff how you doing.
Pikachu: You…my voice, what have you done.
Meowth (deep breath to stop laughing): We captured you, stupid mouse! Or did Ash sell you to us?
Pikachu: you lied.
Pikachu tries to get up, but his new body is preventing him from doing so the old way. He ends up climbing the bar with his now hand like paws, till he reaches his now full height and using the bar as a crutch. At that moment, his nemeses Jessie and James enter the scene.
James: Nice junk you have there.
Pikachu: What?
James: There gave you speech.
Before Pikachu can retorts, he noticed that Meowth is pointing at him, at a very particular part. His eye trail where Meowth paws are pointing, he finds his 'junk' hanging out. He tries to force it back into his fur like all Pokémon can, but somehow that fails and matter worsen by making it more harden.
Jessie: There turn him into a degenerate too!
All three of his nemeses laugh at their nasty jokes. Then he notices how wide Meowth's mouth is when he laughs and how close he is to his cell. He grabs Meowth and jams his 'junk' into the Meowth's mouth. Meowth caught by surprise and tried to spit out the disgusting thing, but a firm grip from his now transformed enemy, making the task impossible. Eventually, the grip loosens, but not without a parting gift of sticky white goo. Everyone looks at him with a shocked expression, and he looks at them with an indifference one.
Jessie: Stop, this nonsense at once! James has you forgotten why we are here.
James: No I have not forgotten.
Jessie (insidiously): Have you got that strange rock, which claims that it could control even Arceus.
James: Yes, (produce a clear looking crystal with a black flame flickering inside). Here is it my love.
Jessie: Oh, Stop it you! Just use it on Pikachu and report whatever happens. Then we can mess around with him.
James throws the strange crystal at Pikachu.
James: Now let observe….(find Pikachu gone), where did he go?
James goes home for the night, wearing regular clothing, after all, his ageing mother doesn't need to know his involvement in some criminal organisation. He enters his house which his ageing mother greets him happily.
Mother: You home early son, anything exciting at the range today?
Yes, indeed, he lies to his mother that he is a Pokémon Ranger at some outskirt that is unsafe to travel for elderly.
James: Just the usual.
Mother: That's good dear. BTW, Jessie, she a sweet girl, you gotta marry her before I go away forever.
James (confused): I never told you about Jessie?