Extract taken from Peter's page on Heroes Wiki -
here Abilities Mimicked
Prior to having his power stolen by Arthur Petrelli, Peter was able to duplicate the abilities of other evolved humans; after he acquired the ability, he did not need to be in the person's presence. To date, Peter had conclusively duplicated the abilities of:
* Precognitive dreaming from Angela Petrelli (Genesis)
* Flight from Nathan Petrelli (Genesis)
* Precognition from Isaac Mendez (Don't Look Back)
* Space-time manipulation from Hiro Nakamura (Collision)
* Rapid cell regeneration from Claire Bennet (Homecoming)
* Telepathy from Matt Parkman (Fallout)
* Invisibility from Claude Rains (Godsend)
* Telekinesis from Sylar (Unexpected)
* Induced radioactivity from Ted Sprague (The Hard Part)
* Enhanced strength from Niki Sanders (How to Stop an Exploding Man)
* Phasing from D.L. Hawkins (Four Months Ago...)
* Electric manipulation from Elle Bishop (Four Months Later...)
* Pyrokinesis from Flint (I Am Become Death)
* Intuitive aptitude from Gabriel Gray (I Am Become Death)
* Super speed from an unknown source (I Am Become Death)