I might tweak the Sunflora idea a little but I do like it!
It's not just her boobs that grow (Though they will swell the most) but her whole body chubs up, leaving her as a fat little shortstack!
The evolving idea can probably work somewhere later on when I get to some of the evolving Legends, like the MC could bang Nebby in her Cosmoem form to get her to evolve into a Solgaleo or a Lunala!
Either that or evolving Kubfu into Urshifu!
Could work for all three. For Solgaleo and Lunala it could anchor them to him since they had his dick in them and can be the reason they evolve to the form since they just need a little bit more mass to start the evolution in their respective areas. MC could be sent two Cosmoem or two Nebby from diff dimensions but the same personality and just take each to a location with the proper energy just need an orgasm to start the evolution. The two would be needed to end the eclipse in the region and get the last legend. Plus it could be the reason why the MC's dick starts making the energy that Necrozma needs to calm down.
For Urshifu it could lead to a way that allows the MC to manage the dark trait she gains after evolving.
This may also be used for Poipole that becomes Naganadel of the Ultra beasts if wanted.
I feel like fully evolved Nebby can take the MC to the other dimension where he can catch the version she didn't evolve into.
There was that mechanic where you could change day and night around if I remember correctly.
Having energy from Nebby and alternate universe Nebby to charge the MC's dick so he can take on Necrozma sounds good!
The mechanic where you could change day/night was by entering the mirror world, yeah. Since the original Sun and Moon dex said Solgaleo and Lunala were male and female counterparts, it's been my head canon that in the OG games Nebby had a child with the Legend in that world.
On that note, if you have to lock this world's Nebby to one of the two Evos, I think Lunala would make sense. That way, the otherwise male Solgaleo from another world could be under the same R63 rules as Team Rainbow Rocket.
