ok. i think it's better if i do each individually.
likitongue marrowak: the tongue's outline at the bottom is really choppy, use the curved line tool to fix that. also, a tip for fusions, they tend to look better if you use the colour of the pokemon there is least of, in this case likitongue. also, you've moved the bone, and it doesn't look like the bit that it's holding and the bit at the end match up.
chansey marrowak: marrowak still has it's ears showing. also, you made the chasey ears come out of bone, you should have made them bone coloured or made a hole in the bone for them. you've removed some of the bone but not replaced the outline on it. the egg looks bad, as it's at a different angle to the body and has it's outlines removed. in this sort of situation, it's better to either make it custom, use an egg from a chansey sprite at a different angle, or leave it off. same thing about the colours as before.
entie: the very simple blue mask recolour is a horrible glowing blue. never EVER use paints defualt colours. you should either take them off other pokemon or use custom colours.
octillery: the wings aren't attached to the body at all, and the bit that used to be silver had had it's shading removed and still ahs silver outline. also, underneath it, there is part of scarmory that hasn't been taken away. may i suggest that the all red wings look strange, so use entirely octillery colours on them, by having the silver as red, as you ahve done, but having the red feather bits as yellow, like thespots on it?
houndour: you've replaced just about all of the shading with one colour, but left the outlines and darkest shading with grey. also, you took away just about all of the outline on the left side.
raikou: default paint red. again, no. default paint colours are glowy and unnatural. the coloud had no shading, and the outline is still purple. the front of it's legs have been entirely made that yellow colour, but the shading is gone, and the rest of the body is the same as always. the tail-star thing has some black on the rigth hand side shouldn't be there...
how you gaveme a 4/10 i've yet to work out...
kepp working at it, all youneed is practise!