Looks like it has Snarl's transformation but some changed parts. Colors don't match up with any official TFs I'm aware of. Pics came from a work friend who's on vacation in Taiwan at the moment, so I don't have any more details currently.
I never noticed it before but you could repaint Grotusque in G1 Snarl's colour scheme and the bot modes would look quite similar. Ironic as both characters are portrayed as being unhappy with their alt modes.