no
Shugo Chara Doki Episode 68
Yes, Dia returns to her egg.
in shugo chara Amu and utau have a battle and dia's X came off then they do a character transformation.In shugo chara party (season 3)amu and dia do a chara change(it's not very exiting she just goes sparkley)and in one of the last episodes she does 1 more character transfromation with dia.
Well, Rhythm(Nagihiko's blue egg shugo chara)will hatch in Shugo Chara Doki episode 40, As for Temari(Nagihiko's pink egg shugo chara)will hatch at Shugo Chara Doki episode 47.
if your talking about the newer group it called shugo chara egg.
The Shugo Chara guardian returns to an egg when its owner is an adult, or the owner doesn't believe in the guardian.
Episode 123 "Party 21 - How do you do? My Name is Hotaru"
the Shugo Chara Egg group no?
The manga & anime both doesn't have anything about it yet. It's just that the company of Shugo Chara Company made it up.. So far she only has 4 nobody but the producers of Shugo Chara have said that and it may happen or could be a rumor..
Episode 17.
In "Shugo Chara!", Rhythm hatches from a Chara Egg during episode 100. She represents the character's desire to pursue music and creativity. Rhythm is associated with the character Nagihiko Fujisaki, reflecting his passion for dance and performance.
The Embryo happens to be the lost Heart's Egg of Little Hikaru.