This is truly the Sonic we know of.

This is what Sonic12 usually look like without any disfigurement to its physical form, even though it looks friendly it's still sadistic at heart.

It doesn't use this design to trick anybody, gain their trust, or force somebody to believe that it is Sonic. It uses the design in any casual standards, either being true to its character, or do what it usually does.

Out of all of its designs, this is the most feared one from the victims perspectives. It's because of how they are sort of expected to see its twisted appearance, but as regular old Sonic, they can't tell if it's friendly or not until the inevitable.