Manic is a hero from Sonic Underground. Manic's spikes are shaggier than Sonic's and Sonia's, and he is green while Sonic is blue and Sonia is pink. He wears a red vest, black spiked wristbands, and an orange fanny-pack, which he seems to fit anything and everything in, from his drumsticks, to his lock picks, to whatever he steals (due to living with thieves in his earlier life). He has brown eyes, and his left ear is pierced with two small gold loop earrings. Interestingly, his shoes bear a striking resemblance to those of Miles "Tails" Prower, who is absent from the series. Manic always addresses his mother as "Ma", though he referred to her as "Mother" twice in the episode "A Hedgehog's Home is Her Castle."
Like his siblings, Manic is voiced by Jaleel White, but he is sung by Tyley Ross
In an alternate reality Manic is a member of The Royal Corrupts Hedgehogs with alternate Sonic and Manic and is a greedy member who only thinks in collecting taxes.