Pokèmon Hentai Version is an undoubtedly unique experience, an erotic game about pocket monsters with a playful, hardcore purpose behind it as well.
On the gameplay side, nothing to report, it is the classic rpg experience with turn-based combat of mainline pokèmon games: the introduction of new unique creatures (the waifu-mon, but also other original creatures in the hands of some enemies) with unique signature moves is definitely appreciable, especially since they are strong, but not "broken." The real flaw on this side is the scaling (I would say obscene) of the trainers: these are very numerous, right from the first path, and equipped with fully evolved monsters. It is understandable that the motive behind this choice is to increase the difficulty of the experience, to make it suitable for more veteran players, but the feeling conveyed is that of an artificial difficulty that forces farming from the start to make your life easier (the Audino trainers found in some towns to allow you to level quickly soon become useless, especially at more advanced levels, while the pokèmon in the tall grass are often too weak to gather much exp). I mean, the last kid on route 1 has a fucking Hariyama, just for fun. The artificial intelligence behind the trainers is not too complex, but it is still appreciable, with strategies especially relevant behind the gym leaders, while in the double battles the pokèmon pairs are designed to cover each other, making them even more complex. To close this section, we can say that the gameplay component is difficult, although sometimes for the wrong reasons (perhaps the beginning could be more gradual and accompanied in its scale of difficulty), but you get used quickly, developing strategies and team formations (to this end, you will often reload the game to experience different solutions) and above all never stopping thinking.
The next point is obviously the erotic component: this is divided into two "strands", namely the furry with waifumon and classic vanilla with female gym leaders and with Asha, our rival and companion of adventure. An unexpected element that I really appreciated are the stories and mini quests behind the waifumons, all different in personality and even with a reason for their strange evolution. The scenes are all hand drawn in a few CGs not animated, nothing special but still cute.
The story, finally, is interesting, with an evil team well thought and a plot that well justifies both the greater difficulty of the region, and the erotic experiences you'll live.
In conclusion, Pokèmon H Version is an ambitious project, which wants to combine the hardcore mods with the erotic mods of Pokèmon, with a result of alternate quality, but certainly appreciable.
Edit: I nearly forgot to add the real mystery of this game, that is: why the hell the first encounterable legendary is Volcanion? Dear developer, do you really hate us so much to give us this horror?