Bingqiu Prompt
Second Ranked Pokémon Gym Leader Shen Qingqiu who abuses one of his monsters, BingBing. BingBing is unable to gain any exp as he’s always sent to fight against Pokémon which are way higher level than him, and thus he always faints before the battle is over. He stays at his base level and is often times used as a shield for Shen Qingqiu’s favorite Pokémon.
The only reason Shen Qingqiu hasn’t released BingBing yet is because one of his favored Pokémon, YingYing, fights so much better with him on the team.
When a tournament is overrun by feral Pokémon, BingBing is forced to fight an ice type Pokémon and is somehow forced into a rapid evolution. This has the effect of revealing BingBing as a Heavenly Demon type. In response, Shen Qingqiu knocks his Pokémon into the abyss so he can use his pokeball for something else.
BingBing doesn’t get eaten by the Abyss, however, instead gaining levels never before seen, evolving into a legendary beast without compare. In the process he becomes feral, gaining a bloodlust for humans and a desire to kill them all.
BingBing discovers Xin-Mo, a Pokeball that acts as a portal through space and uses it to leave the Abyss. He makes his way through the overworld, dead set on seducing lovely Pokémon and killing their humans. He won’t stop until all the humans are dead, and his first target is Shen Qingqiu.
But that’s not really how the story plays out, is it?
Because when Shen Yuan dies and wakes up as Shen Qingqiu, the scum villain of his “least favorite” Pokémon game, he knows he can’t be cruel to his loyal little BingBing.
BingBing is such a determined little bun, never giving up despite all the odds stacked against him. With just a hit of kindness from his human he’s toughing out fights he really shouldn’t just so he doesn’t make his Shizun sad.
But Shen Yuan’s system insists BingBing must go into the abyss, and so he does.
And Shen Yuan keeps the empty pokeball in his team, unable to fill it or the slot ever again.
You can guess the story from here