Chansey will open up her shoppy shop shop after the guild
departs on the expedition! When they come back, it gets open. Since
you are asking a question like this, I shouldn't give anything
away, that is, unless you ask me to! (I hope someone asks, lol)
You may receive an Egg when-
1 Spinda says "Also, this is from that guest over there." You
received an egg!
2 A mission reward is ???, which means either the client will
wanna join your team, Or, you will get an egg as reward.