Single post in Egg Advancement

No support. What if you had Hypermode, Pokerus, EXP Share, Niet Day, and Lucky Egg? That would make EXP for egg hatching too overpowered. If another EXP booster was added, then that means that Shiny chances could increase, even Albino chances (which would also result in MELAN chances raising) That would drop prices, wouldn't it? I think we have enough EXP boosts already. No need for more.