Knuckles the Echidna (Sonic Underground) as Echidna - Sonic Characters by Species Fan Cast | myCast.io
Knuckles the Echidna (Sonic Underground)
Age: 26
male
Knuckles the Echidna is a character in the Sonic Underground television series. He is the guardian of the Floating Island, and protector of the Chaos Emerald that keeps it afloat.
