Anime with a boy wearing a sun-shaped crown
The character on the left is Wataru Ikusabe from Mashin Eiyuuden Wataru.



The character on the right is Daiichi Haruka from Madou King Granzort.



They are grouped together because both series are directed by Shuji Iuchi. In fact, there is a crossover of Mashin Eiyuuden Wataru in the first episode of Madou King Granzort: