 If you liked
Mermaid Melody Pichi Pichi Pitch
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 ...then you might like
Demashita! Powerpuff Girls Z
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Both are magical girl shows that have a similar target audience. It's a little less romance heavy but it does have some romantic elements in a few episodes. PPGZ is primarily just a fun magical girl show and if you liked Mermaid Melody, I think you'll like Powerpuff Girls Z too!