There isn't an anime version. The original PV was for a 2D anime version, but they scrapped the idea to do the 3D version instead. That's the only version there is.
They changed the original Felix to the Adrien we know now because Thomas Austric (the creator) didn't think Felix was an interesting enough character, and they changed it from 2D to 3D. If the series gains enough popularity and continues through enough seasons they may do a 2D animated adaption, possibly with the idea of Chat being cursed and forced to be Chat Noir by Plagg, and needing a kiss from Ladybug to break the curse, but as of now, the 3D version is all that exists.