Sonic Underground Healer (1999–2000) Online
- Original Title :
- Healer
- Genre :
- TV Episode / Animation / Action / Adventure / Comedy / Family / Fantasy / Music / Musical / Sci-Fi / Thriller
- Year :
- 1999–2000
- Directror :
- Marc Boréal,Francois Hemmen
- Cast :
- Jaleel White,Maurice LaMarche,Garry Chalk
- Writer :
- Pat Allee,Ben Hurst
- Type :
- TV Episode
- Time :
- 22min
- Rating :
- 5.9/10
A self proclaimed scientist has come to Robotropolis with a device that will reverse the effects of Robotnik's robotisizer.
| Episode cast overview, first billed only: | |||
 | Jaleel White | - | Sonic / Sonia / Manic (voice) |
 | Maurice LaMarche | - | Sleet / Additional Voices (voice) |
 | Garry Chalk | - | Dr. Robotnik (voice) (as Gary Chalk) |
 | Gail Webster | - | Queen Aleena (voice) |
| Peter Wilds | - | Dingo (voice) |
 | Sam Vincent | - | Sonic (singing voice) |
| Stevie Vallance | - | Sonia (singing voice) (as Louise Vallance) |
| Tyley Ross | - | Manic (singing voice) |
 | Terry Klassen | - | (voice) |
 | Matt Hill | - | Additional Voices (voice) |
 | Blu Mankuma | - | Additional Voices (voice) |
| Cusse Mankuma | - | Additional Voices (voice) (as Cusse Mankum) |
 | Tabitha St. Germain | - | Additional Voices (voice) |
 | Brian Drummond | - | Additional Voices (voice) |
 | Merrilyn Gann | - | (voice) |