Knuckles the Echidna (Sonic Underground) as Sonic the Hedgehog - All Fictional Characters Sorted by Media 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.
