Riolu and Eevee was exploring an unexplored cave, nothing much different from the others they've explored... that is until they've reached the final floor. There stood an orb in the middle of the room, this one doesn't look anything like the other orbs they've seen, it had a blue side and a pink side, and those two colors formed like a "Yin-Yang" on the orb.

Riolu grabbed it, intrigued by what it could do, he was quite hesitant to use it, but Eevee told him not to use it yet.

Eevee: No wait! Maybe we should seek information... maybe someone in Treasure Town knows...?

Riolu: I guess you're right, there doesn't seem to have anything else in here, let's go back home!

Upon going back to treasure town and stop by the guild before going back to Sharpedo Bluff and ask Chatot for any info because, as he's called, he is the head of intelligence of the guild... however, like anything that's really rare, he doesn't know anything!

Chatot: I see, this is quite a unique object! Unfortunately... I don't know anything else than you about it... however, I suggest you test the effect. But not right here! We don't want to destroy the whole place! Use it somewhere else like the cave next to the beach!

Upon hearing this, the duo agreed to go just the two of them in the cave, and when they got there, Riolu activated the orb, unleashing it's power with a light that blinds the whole room, surprised, they fell on the ground. When they could see again, they got up, nothing seems to have changed, the orb was there, empty... But that's when Eevee felt something between his legs and under her tail.

That's when the two realized that Eevee had what appears to be a penis instead of a pussy... confused, she yelled, but then she just heard herself with a masculine voice. Riolu tried to reassured her, or should we say... him!

Riolu: It's okay... we know that the effects of orbs lasts for, at most, one day! An-... wait... my voice! It changed too!

As he noticed that he had a feminine voice, he checked his crotch just to feel his paw rubbing a hole, a vagina in fact! The both were confused, and shocked! They exited the cave with the effect still there and reported their findings to Chatot who was also shocked.

Chatot: S-Sqwack! You two... changed sex because of the orb!? I guess it's good that it's temporary but...that's quite a weird orb! All you can do is wait for your sexes to change back... sorry...

With that, the two went back to Sharpedo Bluff, not used to the new feeling of being now a male or female. This adventure wouldn't be for nothing tonight however! While they layed on their back, Riolu came closer to Eevee and kissed him deeply, slowly reaching his little pokehood.

Riolu: Ever wondered what males feel during sex...? Now you can...

Eevee felt what Riolu always felt when he was still a male. He felt his cock growing and becoming harder as the female Riolu pawed him faster and faster...

Eevee: Oh Riolu... it feels amazing... keep going...

He said with his deep shuddering voice, his hips twitching each time Riolu touched the most sensible parts of Eevee's penis. Riolu went further and began sucking Eevee's dick deep... rolling her tongue around it as he moved his head up and down... And while Riolu produced slippery sound, Eevee gasped and moaned, those sounds became both more frequent as it continued.

Eevee: H-Hey... bring me your pussy... I can't be the only one being pleasured in this situation...

Riolu agreed and got on her knees, on Eevee and back turned away from him... There, Eevee's head could reach Riolu's pussy all the while she could continue sucking him dry... it was her turn to receive what Eevee feels when Riolu gave a cunnilingus each night... And so he felt her G-spot being licked and Eevee's muzzle exploring the outside of her pussy, only pleasuring the most sensible part. Riolu reacted by gasping for air all the while moaning her mate's name before going back to sucking her mate's pokehood, but with faster movements...

Riolu: Mmff... Ohhh Eevee.... mfff...

They both were close to climax, as seen by Eevee humping Riolu's face and Riolu's pussy laying right on his face instead of just over him. As they were about to cum, they used there arms to grab each other's ass. Muffled screams from their pleasures vibrated each other's genitals as thry drank the fluid of each other that came from their genitals: Pussy juice or semens.

Riolu: That was... so amazing , never thought... I'd miss this much as a male...

Eevee: Could say the same thing...

Just then, the Eevee smirked at Riolu's tired body. He saw that she was about to fall asleep, but he wasn't letting that opportunity go...

Eevee: Hey...! Stay awake...! I'm really curious about how it feels to fuck... this will probably be my only chance at discovering the feeling... that's why I say... we aren't done yet hehe...

Eevee got up and make Riolu do the same, getting her on her knees like a doggy presenting her pussy to his mate.

Riolu: F-Fine, just... be gentle...

Eevee nod his head and mounted Riolu like a horny male, penetrating her pussy. He was going really slow at first, however, he rapidly increased in speed. The two moaned as the slapping sound of his hips touching Riolu's ass could be heard just outside Sharpedo's Bluff. But soon, the slapping sound were transformed into slippery thrustings when Eevee made her turn around, face to face with his fucktoy, he kissed her deeply has he was reaching quickly his second orgasm...

Eevee: Grr... oh yeah... take it... my love... take it ALL!!!

He knotted inside Riolu, filling her inside... they didn't worry about impregnatingvm.Riolu, as he will turn back into a male and Eevee back to a female tomorrow, however, this night had to be one of the best of their lives, close to their first time...

And maybe, once they get hold of another sex swap orb, they will do it all over again!