Do you have any ideas for a future Sonic voice cast? Heres mine. Sonic - Hailey Joel Osment Tails - Kate Higgins Knuckles - David Gallanger Amy - Hayden Panettiere Dr Eggman - Mark Hamill Shadow - Ben Disken Silver - Jesse Mcartney Blaze - Willa Holland I'm sorry if most of them are from Kingdom Hearts. But I seriously think Mark Hamill needs to voice Eggman.