If you're looking for anime similar to Shugo Chara!, you might like these titles.
Yuuna Yuuki is an ordinary second-year middle school student. She gets up in the morning, gets ready for school, goes to classes, participates in club activities, and has fun with her friends. But there is one extraordinary thing about Yuki -- she belongs to the “Brave Hero Club.” What does the Brave Hero Club do? Who is the mysterious being called “Vertex?” Yuuki Yuuna and her friends’ story takes place in Year 300, Era of the Gods.
One night, Madoka has a terrible nightmare – against the backdrop of a desolate landscape, she watches a magical girl battle a terrifying creature, and lose. The next day, the teen's dream becomes reality when the girl – Homura – arrives at Mitakihara Middle School as a transfer student, mysteriously warning Madoka to stay just the way she is. But when she and her best friend Miki are pulled into a twisted illusion world and meet a magical creature named Kyubey, the pair discovers that magical girls are real, and what's more, they can choose to become one. All they must do is sign a contract with Kyubey and agree to fight witches that spread despair to the human world, and in return they will be granted a single wish. However, as Homura's omen suggests, there's far more to becoming a magical girl than Madoka and Miki realize...
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The sporty Nagisa and the bookish Honoka are ordinary middle school students, but when two strange creatures called Mepple and Mipple force them together to form the magical girl squad Pretty Cure, their differences soon give way to a developing friendship. But being a hero of the Light is not all roses! Will there be enough time for studying, playing lacrosse and cute boys in between their battles against minions of evil?
Konagai Tomoko is a first-year in high school and a shy girl. Tomoko owns three cats. The cheerful and live Munchkin Maa, the smart and responsible Russian Blue Rou, and the gentle crybaby Singapura Shii. Tomoko, whose only friends were her cats, one day becomes friends with Shiratori Azumi, who also loves cats. This is a fluffy and cute comedy about the daily life of Tomoko and her cats, Tomoko and Azumi's friendship, and the interaction between cats.
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Similarities include the cute chibi form of the pets/guardians with distinct personalities from each other, some cute interactions between them when the owners meet, and the mc has 3 of them.
Difference, well Nyanko is slice of life while Shugo Chara is mahou shoujo.