@Odenbirb50
He did take Sega (and Bioware) to court, because of Sonic Chronicles. Because he thought the Dark Brotherhood was similar to his Dark Legion (you know, the group that kinda was, definitely based on a certain German group, which he made for the Archie (no not making that up, and people wonder why people like IDW over Archie)). He actually won that case, which is why outside of Knuckles and Knuckles Clans, you don't see any Echidnas.