Sonic Tonic (episode)

Sonic Tonic is the eighteenth episode of Sonic Underground.

Characters

 * Sonic the Hedgehog
 * Manic the Hedgehog
 * Sonic the Hedgehog
 * Doctor Robotnik
 * Queen Aleena(voiceover only)
 * Sleet
 * Dingo

Song

 * "Fastest Thing Alive"