Going to give you an honest one, OP, since there are tons of zoomers here who overblow everything
Sprig is standing up like the leak said, it has a mask on it, it also has a split cape, and it's legs look like all the way up black leggings. it is a magician 100%, it looks like it throws around leafs in a magic kind of way, and just has a look to it like it knows it's good at it, a little smug some would say
Fuecoco is on all 4s, but can lean up (doesn't look like it can stay like that for long though), has a bald white head (doesn't look like a skull like some thought it would), long crocodile mouth, little circular flame bird on the tip of it, has mouth flames like Charizard X but it's just fire colored. loses the yellow spots on it and his body is just white and red, mainly red, and on the top of his mouth there are multi colored squares, think of day of the dead colors.
Quaxly didn't have a good picture, all we see is it's blown up sprite, but it also stands up straight, looks a little like blaziken in shape, does not have bird feet or legs, more thick and human shaped, has webbed feet still though, the little toothpaste on base quaxly is really it's biggest feature since it continues to grow each evo, big ol thing on the final one, has like a long arm sash made of water on it's left upper arm. looks like a really strong kicker. the had and his webbed feet have a nice crimson red that goes with the deeper blue he has
