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Number of tankoubon in the "Shugo Chara!" series : 11 , "Shugo Chara!Encore!" has 1 and "Shugo Chara-chan! " has 1 .
Yes, there was a Season 1.
yes they are ^^, i believe this is what you are after =D
http://www.amazon.com/Shugo-Chara-1-Peach-Pit/dp/0345497457
Shugo Chara!! Doki followed by Shugo Chara Party!
You should start at episode 1 first.
Shugo Chara Doki is the new 2nd season episode 52 plus.