It's always amazing to see your Pokemon artwork, and this truly shines as being awesome! I especially love it when you draw Legendary Pokemon like these. X3
The way the Legendaries are emerging from the Burnt Tower is a perfect depiction of the "re-birth" of these Pokemon as they head off to wander and roam Jhoto. The colors are very bright and colorful as everything blends beautifully and perfectly. Technic is very simple, but very detailed and perfect for your style and matches the familiar style of the Pokemon themselves, which is great. I love it, and I bet that many more Pokemon fans, like myself, will love it too! :3
I must say, this is extraordinary. The work clearly shows the exact moment when the three brothers exit the Burnt Tower and scatter around Jhoto. I would not say this is completely original, because this has been a popular picture many tend to draw, but the way you draw is is clearly your own imagination. The technique you use is great, as the colors blend in very well, and I can tell you put in your soul. The impact, in my personal opinion, was great, but not to its maximum. Unfortunately, I'm no artist, so I have no idea how to give you constructive criticism on this, but I don't think this really needs improvement.
I would also like to point out the aura you gave to each of the Legendaries. They just explode with a aura of dominance and fierceness that not all artists are capable of bringing out of a painting.
The only confusion I have is Raikou. I don't see how its physically possible it would be able to jump out, but be in that position. It looks as if it is standing on an invisible glass floor, not much as jumping out of the pit, like the others. Though, this is not much of a big deal.
My overall review of this is simple, this work is pure magic. *Claps* All you need to do is think of the position. I see that you were going for Raikou to seem as if he's falling down from his jump and onto the floorboards, but its not as obvious as it sounds. Thank you for making such a wonderful work, and please continue to create more!