Puchi Pri*Yucie, Sugar Sugar Rune Recommendations
Puchi Puri Yuushi/Petite Princess Yucie and Sugar Sugar Rune Similarities:
-Both have a spunky heroine
-Involve magic, and fantasy elements like unicorns, dragons and fairies
-Both about young girls wanting to become royalty, with tests and tasks against other girls (Yucie is actually 17.. but looks like a 10 year old so this is a little different)
-Friends are close and rivals
-In both the characters have to collect magic items to become Princess/Queen, in Yucie they collect fragments of a magical tiara and in Sugar Sugar Rune they collect crystal hearts
Overall they are both cute shows with similar elements, if you like one you will probably like the other.