Weakness offends Grimlock. He considers none so weak as those who refuse to use their full strength to command victories. As a result, he's never had much respect for Optimus Prime. He barely even considers himself and his Dinobots to be part of the Autobot army most of the time. He only grudgingly helps the heroic Autobots because the tyranny of Megatron offends him even more than weakness. He longs for the day when Optimus Prime makes a final mistake, leaving a vacancy that Grimlock will be more than happy to fill.
The interesting addition is the Diaclone Driver / Inch Man cockpit which this retains from the original 1985 release. There is even enough room for the MP-10 Spike to sit inside albeit not fully.
This figure is certainly one to pick up especially as its much cheaper than the other Masterpiece Grimlock releases (at the time of writing).
View the full gallery here on flickr.
MP-8 Grimlock (2009) Takara Tomy
MP-8X King Grimlock (2009) Takara Tomy
Masterpiece Grimlock (2010) Hasbro
Grimlock (2013) Hasbro Asia Cybertron-Con Beijing Exclusive