Lopunny

You became a Pokemon trainer, after a long time for whatever reason you could be one when you were 10 at minimum, but decided after becoming an adult for whatever reason, and you just got your starting Pokemon, you can choose if it's Either Squirtle Bulbasaur or Charmander, whatever, you choose it, i'll not choose what of those 3 you choosed, so you have more control on the story.

After getting your brand new Pokemon, you went to buy some, pokeballs, and now, you went out to explore, to find any wild pokemon, that might interest you, after a pretty long journey, you come to face with a very tall Lopunny, and something about her catches your eye, she is extremely tall and... Voluptuous as we can say... She is extremely tall, taller than you even.

Now, determined, you send your Pokemon out of the Pokeball, and tell it to go fight the Lopunny, but things didn't go as you expected, Lopunny simply looks at your Pokemon charging at her unimpressed, and she simply hops and does a double kick on it sending it back then, when it tries to get into her again, she turns around rapidly and slaps it with her absolutely Massive ass, your pokemon fainted...

Then Lopunny looks at you, you, panicked and run away putting your Pokemon back in the Pokeball, Lopunny, obviously much faster than you catches up easily, and she hops into the air, and she falls on you smothering you with her gigantic ass, now she forces you to worship her ass.

"Wow, not gonna lie, i'm tired of those starter pokemon trainers thinking they can beat me that easy, it gets boring after a while, you seriously thought you could easily capture me? Like seriously, try making your Pokemon stronger before doing that~"

She gigglees grabbing your wrists forcing you to put your hands in her ass cheeks and caress them.

"Well, what about you give this absolutely giant fat ass i have hmm? Just accept you lost already, don't resist."

She said with a playful chuckle, beggining to press her ass further into your face, is getting harder for you to breathe.