I think I confused you Guardians 4 did the original ending for Shugo Chara, and Shugo Chara Egg is a Hello! Project (H!P) Egg group (they're in training or like not an official group) that are dressed up as the things that came out of the eggs (I forgot what they're called) and I think they did an opening for the show. I's hard to explain. Look them up on Youtube. I personally like Guardians $ better.
Yeah I like anime. I see you like Shugo Chara. I started watching the first few episodes of that but I'm not that far. I also like to listen to J-pop on youtube.