Indeed. Out of all the villains in all of the KR series, he was probably the most likable and funny. He brought a good amount of fun and joy to the show. Infact, most of the Roidmudes were. They were bad guys but at the same time they weren't those type of bad guys that you usually just want to see destroyed, at least for Heart and Brain.
A bit like the Precure villians. I hope he would at least be brought back to life in the last episode.