Latest batch is simply delectable! I'd really love to see any more additional information you have on these guys, like abilities, what level/how they evolve, typing, and other details like that. :)
I'll add them for the ones I implanted in the first post. Usually it takes a while for a sprite to be implemented so I haven't thought of the details yet. I don't know anything about competitive pokemon though, so abilities are usually the abilities of the pokemon they're based off.
he's my favorite;

probably cause he's adorable and so realistic<3 i definitely love your work. i always wanted to go into making pixel sprites, just not sure i would be any good at it. lol. i would definitely work on the smaller sprite versions that you have of pluff. they just look too blurry and need more detail. like fairy said, the latest ones are your best.
nicely done!
Start out with fusions, and slowly add more pokemon, and try to make the whole a unrecognizable new pokemon, that's how I practice.
Two new sprites, but full psychic sprites.

Wickat (Wiccan + Kat (Dutch for cat))
Psychic type

Monkic (Monkey + Psychic)
Psychic type.
This sprite is actually an old one, and I guess no one here has seen it. I made it way back in 2012 under the name Giraplatina.
Some backsprites, icons, and shinies:
I'll edit the first post to have all the sprites, and have the information about them, if available, sometime tomorrow. I really want to sleep now, and it's quite some work, haha.
I'm really out of ideas, so I'll happily take your request, don't be afraid to ask for more than one. I have a lot of spare time.