A young royal male lead, who was once the heir to a massive, now decimated, kingdom, who carries around a mystical artifact, traveling the world with a small group of friends and a pet, on a mission to locate and retrieve several other mystical objects before the villains get them. Both stories even take place on an alien world; Merr for PotDW and Third Earth for the TCats.
Konk is the name you’re trying to think of Brutikong. Voiced by an almost unrecognisable Tim Curry!
But yes, srebak, I’ve just been rewatching “Legacy”, and I was thinking the exact same thing. The powerful gemstones are scattered over the planet, and our heroes must retrieve them. I suppose there’s a similarity to “King Arthur And The Knights Of Justice” too, where they had to find the twelve keys of truth . . . that show was kind of dodgy in its treatment of the Arthurian mythology, but it also had the most awesome theme tune of any cartoon ever. Fact.