Okay, looks like you got taken advantage of that time, Ember, but we'll use it to our advantage. First, since you love that egg so much, Mimic his Nasty Plot so later you can show him that you can do it too. Then wait until the skies get all hot and hit Surskit with a Flamethrower. Then go and give your "eggy love" a Helping Hand with his Solarbeam.

If Surskit tries to make it rainy again after Togepi makes it clear, make it a Sunny Day again.

Mimic: Togepi ~^~ Flamethrower: Surskit/Sunny Day ~^~ Helping Hand: Togepi