what lies within the tails doll, cuz im sure that under all that cuteness is something evil that mankind should neva see.

PlEaSe. LeT tAiLs DoLl HiMsElF aNsWeR tHiS. i Am A bEiNg CoMpOsEd Of EvIl EnErGy. I wAs sEwN iNtO tHe BoDy Of A fOx DoLl FoR rEaSoNs I dOn'T eVeN kNoW.

The tail doll is a evil cruse that was not ment for mankind to see.

If आप think about this सवाल literally, he might not be so cute under his skin. He might be a robot wearing a costume, since the other characters in sonic r were robots. I think he's not evil. Maybe he wears a cute costume to hide his ugliness.