You're in a small rowboat, traveling across a river in the Johto region. This river is known for being split into two different streams - one above, one below - that convene at a small lake in the lowlands. You chose the calmer lower stream, since the upper portion of the river has quite a few waterfalls, which are hefty drops that you're not sure you would survive.
As you row along the lower stream, you end up passing a small sandy beach, where a few other boats have been parked and hastily abandoned. You're not sure why that is, but as you pass a few small drops and row out into the lake basin at the river's bottom, you get your answer.
Perched on a rocky outcrop next to the roaring waterfalls of the river's upper stream, there is an absolutely enormous Pheromosa. The strangely curvy roach-like Pokémon is casually lying on her side, one of her huge breasts and her left thigh being partially submerged in the water. Her cleavage is just barely covered by a gold-colored bra, which only does enough to hide her pebble-like nipples.
As you drift closer in your boat, carried by stray currents, Pheromosa looks down at you, her half-lidded purple eyes radiating with absolute disinterest and apathy towards you. She isn't even making any attempt to move... yet.