your fusions seem good, but be careful when you copy'paste things, there are bits missing off the first two sprites, off the dinosaur's leg and the monkey's hand thingy.
the third one along's head thing looks a little odd, ad the dragon things's crest goes sideways, but the plant bit goes up, and the join isn't very smooth. i sugest when things don't match like that, take away whatever is on the base sprite and replace it completly, in this case, don't have the crest, just the plant.
the last fusion is really good, i can't see anything wrong with it, the beak thing fits it really well, nice job.
all the others look great, the wtf one made me laugh. on peliper, part of it's original eye still shows, though.
the holiday ones are good too, just a word about stripes, like on the candy one: look at any striped pokemon. the stripes curve to match the shape of it's body. on your one, the stripes are strait across, which looks unnatural.
one last word, not about the sprites. the image is shrunk, probably cos it's so big. to keep the quality of your sprites, try saving them separately next time, and always remember to save as PNG, it will make them look much better.
overall, very nice work, you look to be a great spriter, keep it up!