Sonic X, Hoshi no Kirby Recommendations
They are both based around a video game series. They are also funny, and aimed at a somewhat younger audience.
Both star an iconic video game character and each have something that fans of the game series will enjoy. People who have never played the games might get a kick of these as well.
Both anime are based on iconic video game characters and are targeted to the same audience. They both have simplistic plots, focusing on main characters are often engaged in battles against other creatures, but always come out victorious. Both have a similar mood and atmosphere.