not to mention this is the first Two breeding outside the lab - it had never even proven before on top of apparently mew reproduction is not understood and officially not even known
( don’t think there is an official explicnation in actual cannon, and we only heard the comic’s cannon not long ago)
so, smile Hue, you are lucky to be here.
also you can still call mewtwo “Two” or “uncle two” as a reference to his relationships or to rub it in
And not only that, not only does a mew or a two have to be in the area to recive the pollen but their mental physical and spiritual health have to all be in good condition for them to even conceive (according to mew in the previous comics)
Apparently a flower that only blooms every 3 to 7 centuries.