Yeah, I agree with dmaster about the artwork for the Shiny Raikou, Entei, and Suicune. They all have really awesome artwork. The artwork for the Celebi distribution is pretty cool too.
Now the moves on the shiny legendary beasts are really awesome. Suicune has Air Slash, Sheer Cold, Aqua Ring, and Extremespeed. It's also holding the Rowap Berry. The Shiny Raikou has Zap Cannon, Aura Sphere, Weather Ball, and Extremepeed. It happens to be holding the Micle Berry. The Entei has Howl, Crush Claw, Flare Blitz, and Extremespeed. It seems to be holding the Custap Berry too. Wow, they all have really awesome movesets and items. I bet they can work really well in the VGC. Currently, if I were to choose one of them, it would probably be Suicune. I think it is the best of the three in my opinion.
The Celebi isn't too bad also. It knows Nasty Plot, Recover, Leaf Storm, and Healing Wish. It's holding the Jaboca Berry also. Obviously, it seems to be great for recovery, and it is in a Cherish Ball, which is very nice. What I'm glad about Celebi is that we finally have an easy of getting one compared to the past, where more recently, it has become very hard to get one, but now that there's a Celebi distribution now, it is now easy to get a Celebi. It also unlocks the Giovanni event too in HGSS!
Well, I definitely can't wait for the distribtion for the Legendary Beasts and Celebi. They all look so awesome!