As tucker was taking a stroll through the forest, he spotted a poke ball on the ground. He but his backpack down and decided to investigate it

Tucker wasn’t a Pokémon trainer, and opened the ball the wrong way. And a green goo came out of the ball and onto tucker.

“this isn’t a Pokémon!” He said as the goo took over his body. His arms started to merge into his body and his legs into one. He became more snake like, and before he knew it, he became a serperior.

He ran away, hoping to find someone to help him. He met a trainer in the woods who mistook him as a Pokémon, and captured him.

“Eh... I don’t need a serperior...” said the trainer. She took the ball and put it in the Pc.
Now tucker is forever stuck inside a ball, as a serperior.