Voices I can do

Perfect

 * Elmo
 * Shadow The Hedgehog

Use to be able to do

 * Big The Cat (trying to re-learn)
 * Sonic

Voices I can almost do

 * Mickey Mouse
 * Barney
 * Silver The Hedgehog
 * Kermit
 * Grover

Voices I WISH I could...

 * Phineas