This is a pretty nice Toys R’ Us exclusive. The Transformers Age of Extinction Grimlock Evolution 2-Pack comes with a classic Generation 1 like Grimlock based on the classic 1984 cartoon and the Age of Extinction 2014 version from the movie.
If you don’t want to pay big money for a G1 Grimlock, here is a cheaper option you can pick. I do not have Grimlock yet, so it is an option I am thinking about. I have been eyeballing the dark blue Generation 2 Grimlock as my cousin already has the G1 version. But what I like about this one is that the head is not a teeny weeny wee little thing like the original Generation 1 release. The new Grimlock looks really nice, but I haven’t gotten around to seeing the movie yet. So I do not have any attachment to it like I do for the G1 Grimlock redux.
Both robots change to Dino mode or into a tyrannosaurus rex.