Generation 1 Bumblebee is a commissioned piece. Used a G1 Bumblebee, gave him a new head (from Universe/RTS BB) new arms and legs (gundams) and paint job. Bumblebee does not transform, but is super articulated; head on ball joint, ball jointed shoulders, hips, swivel at bicep, elbows, hands, double jointed knees.
I like the wheels in the feet - inspired by the DW Figueroa model, or just common sense?
Surprised that Hasbro/Takara haven't really tried the tricked out Action Masters approach again more recently as a collector-orientated sideline; the non-transforming figures we have had have been pretty lousy by contemporary standards compared to the articulation and detail seen on Gundam figures.