Even through Selph was deleted, a hacker discovered some of the Selph's data in the roster, right before Wizeman's. This jewel of information included a music track of what would have been Selph's battle theme, entitled "Know Thyself," which bears an interesting resemblance to "Dreams, Dreams," leading many fans to believe that Selph has a strong connection to NiGHTS,leading some to believe Selph may strongly resemble NiGHTS. However, no data exists relating to any physical designs for the deleted boss, leaving fans to speculate and invent possible designs for themselves.
Another nugget of information discovered were parts for a sort of "mirror staff" and additional information regarding the data, found by another hacker.
- Selph was supposed to be based on the Self archetype, which is the most complex one, that was probably one of the reasons why Sonic Team didn't make him in time and he would have created a conflicted story, since he was a secret boss. Also, NiGHTS is based on the Shadow archetype that is opposite of the Self. Selph could have made NiGHTS Into Dreams... an unique example where the Shadow is a positive character and the Self negative one.
- According to Jung, the Self archetype appears in dreams as royal figures, divine beings, mandalas and holy items. Also, the archetype of Wise Old Man is considred the first indication of the Self, meaning Wizeman was probably related to Selph
- Selph may not be an actual nightmaren since he is based on the archetype that appears as grand beings, often expressions of The Self have numinous aura around them though the nightmarens are based on fears.
- Possesion by the Self and mana personalities, that are lower expression of it (Great Mother and Wise old man) causes megalomania, delusion of grandeur and hyperinflated sense of self which "Myself I could never be exceeded" probably meant.