You may be looking for Doctor Finitevus from the Mobius Prime universe.

Doctor Finitevus (Light Mobius) is the Light Mobius counterpart of Doctor Finitevus from Mobius Prime. At some point in the past, Dimitri came to dislike Finitevus. This was revealed when he expressed shame at having worked with him, an event that was only outclassed by Lien-Da's conspiracy with Mobius' despotic king, Shadow the Hedgehog. (StH: #167)

Finitevus was never actually seen, only mentioned in dialogue.

Many fans believe Doctor Finitevus to be involved at some point with Lien-Da, and that he is Rutan's father due to the white tips on his dreadlocks.