During the exploration, Trainers may pick up monster ball where the item was in.
One day, He picked up a monster ball in an abolished factory. But the contents were empty... No, One drop of pink liquid only entered inside when he looked well.
"what...?"
At the moment when he slightly opened a mouth and muttered, the pink liquid was shot out and jumped in a mouth. Bitter taste spread on a tongue, and he frowned. The liquid stuck to a tongue like paint at all and was useless even if he was going to scrape it.
"Will tear it off if I go to the Pokemon center?"
He thought so, and went to the exit while frowning on bitterness.

But the change of the his tongue began in the mouth. A range painted in glossy pinkness has begun to expand on a tongue, and the transparent viscous liquid which is different from saliva oozes out from changed tongue.
The goo have begun to change the substance to the inside mouth and tooth.
He mistook goo for slaver and swallowed. The goo is bitter for the normal human, but he swallowed it many times without minding it, Because changed all in his mouth, and the taste changed, too. The goo changed surroundings more while slid down at a throat and internal organs.

Meanwhile, He feels sense of incongruity in a mouth incidentally, and touch a tongue with a tooth, ... then surprised.
The tongue was the touch smooth strangely! There was no slight rough asperity. The tongue was very flexible but there was strong resilience when he chewed by a tooth lightly. It was the joyful touch.
He thought that it was strange, but it was the fantastic touch as he denied it.
He rolled a tongue in a mouth and chewing in spite of being a walk, but the comfy touch changed his tongue more.
The tongue has begun to bulge in a mouth, thick, and roundy. The tongue didn't settled in a mouth before long, and he spitted it out....