Wow. So much to say, but so little room.
This takes my breath away, it's such a strong image.
Overall, it's a very good picture that captures the theory perfectly. There's also a wonderful attention to detail, from the floor of the tower and the ridge on Vaporeon's back to the subtle color changes on the edges of Ho-OH's wings.
My only nitpicks are that Suicune's face looks a bit too long, and the fog-looking stuff in the background cuts off just before hitting Ho-OH's tail. Why is that?
Nitpicks aside, this is truly a wonderful piece of art, and one that I quite enjoyed. Keep it up!