Wagamama Fairy Mirmo De Pon!, an obscure anime that is basically The Fairly Oddparents if it was a shoujo. When I was in elementary school, it was on regional TV right after classes ended, and I loved it. It was the first ever media I could get my hands on that had an intriguing plot that I wanted to follow. I missed the series finale, tho :(
Some time ago I went back and rewatched it, complete with the finale and all. It was nostalgic but also kinda hard to rewatch because it’s so clearly made exclusively for children. It was so obscure that the only full download I could come across online even had the logo of the regional TV channel where I originally watched it as a child.