Wow, these are really cool! My favorite out of these three would probably be the Reshiram. The use of all of the HF armor on the arms makes it look smooth and stylish. The Ehlek claws on the tail engine make it look pretty close to the original. Although, for the mouth, could it be possible to fill in the gap between the two white Bohrok eye-pieces with something like a Metru hand-piece? Great job! As for Zekrom, I like the translucent blue Metru handpiece at the end of the spike on the back of Zekrom's head. The Brutaka blades are also really good as the wings. The gap in the tail generator is a little annoying, but the MOC is still great. Kyurem is pretty good, but the main body looks a little bit cluttered. Maybe you could try layering the different colored pieces more? Anyways, I like how you used the Agori body-pieces and legs as the wings, and the Mantax claws were nice as the spikes. Good job on all of these, Takua!