What a cute, defenseless little thing. How often do you reckon Poochyenas get raped in the wild? I can't imagine it'd be too hard, even for a Zigzagoon. The sturdy fuckers could give em a single headbutt and leave them stunned to be their helpless fucktoy. The poor, whimpering puppies would have to take it as best as they can, maybe even several times in a day. You'd see a pack of them running through the forest, and they'd all have creamy white liquid streaming out of their behinds. IMAGINE the abuse they'd get from disadvantageous type matchups, like from Hairyama or Mahukita. The ecosystem would probably evolve and assign that role to them: soon any pokemon looking to relieve sexual tension would grab the nearest Poochyena and use it as a cum rag.

Of course, as they're weak enough to get overpowered by humans, I imagine the latter would get in on the action, too. It'd be mostly young children and maturing teenagers struggling to contain their hormones. Either as a dare by their friends or out of their own volition, they'd seek the puppies out in the forest, and use them to teach themselves the basics of carnal pleasure. The girls, too. They'd hold the Pooches by the neck and force themselves on top of them, until either they or the Pokemon cum. Then they'd discard them out into the bushes, like forgotten toys, too focused on the sexual high to care if they broke something or injured the dark types.

Anyway, there's a reason Mightyena are among the most loyal Pokemon out there. They spend their entire maturing years being somebody's bitch.