To gain thet egg you must go to the iron island an meet up with a certaint person inside (I'm not sure who I will have to check again) and he will want to go trough the island with you. After completing the island there will be 2 galactic grunts. Defeat them and the guy you went with nwill give you the egg if you have an open slot in your party. If you don't have an open slot he will wait there until you do and pick it up.
It evolves with the happiness rating.
Iron island the man gives it to you!
yes if it is darkrai riluo or manaphey
Anytime you consume for calories in a day than you expend, its possible to gain weight. A calorie is a calorie. Raw egg alone will not make you gain weight unless you eat more calories a day than you burn.
It makes your Pokemon gain about twice as much exp.
no
Eggs soaked in distilled water will gain mass and appear dramatically swollen. Eggs in dilute salt solutions will gain mass, and even those in very concentrated solutions might gain mass. Eggs buried in salt or other dry media should lose mass.
I don't think so; they don't absorb the water that they're boiled in because the eggs are not in water for a long enough time to do so. And while the egg itself transforms from raw to cooked it does not gain or lose weight.
They either inhibit the release of an egg, or prevents the egg from implanting - therefore the womb purges the lining before the egg can gain nourishment.
You will gain weight from eating anything ...
Yes
. Yes until they get older and gain wait and have to take Lipator then they switch to egg beaters and rice cakes