One thing I would suggest for fusions is adjusting the shading of bits you splice on. The really black outlines of the houndour's legs in the espeon/houndour fusion look out of place compared with the outline's shading for the rest of the sprite. Also the outlines of the bones on the back are too light. Same with the lighter beige colour on the shiny blazicario's head. Make sure that the degree of darkness/light for outlines is consistent between the colours of the same sprite. :)

I quite like your neon ones! :D They're very nice. I would suggest for the dratini and dragonair making the indigo colour lighter, because it does sink into the black background. Also, you forgot to colour the dragonite's antennae yellow. O: