You can feel how you feel about Graboom... not my problem really.
Well that is just an ignorant and arrogant attitude, frankly. What's the point of displaying your work and then consequently asking for critique, just to throw it back into peoples' face?
Hopefully this critique will be taken in.
Okay. The features such as the face and limbs are too small, and the body needs to be smaller (proportionately, of course). The perspective of the sprite seems to be as if we are looking at it from miles away whereas the official style of Pokémon sprites are when the player is relatively close to the target, considering the battle distance. The banana looks very flourescent and is clearly not the colour of a banana - additionally, props (for want of a better word) on Pokémon sprites are normally related to the Pokémon in some way or the other (i.e. the spoons for Alakazam and Kadabra relate directly to the Pokédex entry), but the vine and banana just seem to be there for the sake of being there and would make sense with, say, Primeape, or something, as it is a typical thing and doesn't really say anything unique about the Pokémon.
As I mentioned before, the limbs on Ooh-Ooh (which, by the way, as NikNaks stated, is a really annoying name :/) are anatomically incorrect and are inconsistent with the rest of the sprite's body (where the torso and shoulders, especially, are abnormally large). What I presume to be the tuft of hair in the middle of the male version of Ooh-Ooh looks very unnecassary and unrealistic. And even if it were required on the sprite as a feature, it was executed very poorly, and looks like flesh more than fur or hair. Speaking of which, the shading throughout the whole sprite gives the illusion of a smooth surface, which is presumable not the desired effect. The hands and feet looks tacked on and don't merge properly, and their colour scheme are just as bad as the typical blue, which isn't improved when changed to white in the shiny counterpart, either.
Finally, I'd just like to point out that Ooh-Ooh's tail is merged with (our) right leg. I suggest you completely redo and revamp the concept and sprite, respectively.
Hello there badly-executed Gastly and Haunter rip-offs!
Honestly, "Groopeneye" (which, by the way, wouldn't fit in an official Pokémon game, both name-wise - which is, again, pretty shoddy - or size-wise) is just a Gastly with all sense of orientation (at least according to the official games of Pokémon) and shading lost somewhere along it's mutation. The "Ctrl+W"ed... things...around the main sphere seem unnecassary and out-of place.
You didn't even change the outline on the resized spheres around Kingor, which also has badly-done shading, etc. These really look like they were done on your phone or something in five seconds. :/
It's a miss-orientated Slowbro thing. Nothing to say about it except it's facing the wrong way and the shape is off. :/
These are presumably retypes. And they are badly-done presumable retypes, too. The outlines of the copy-pasted 'stones' and 'rocks' don't blend with the outline and the hands/feet's of Ratistones' colouring clash, and really don't go. Not much to say, really, except that these aren't the best of retypes, and, again, seem rushed.
...Do I really need to comment?
You recoloured the wing colour to an eye-sore orange. I don't get it.
The outline clashes and is inconsistent, and the colouring is just as bad. Again, I can't really comment on this. :/
The black areas of this sprite haven't been shaded enough which presents a... uhm, I don't know, dark? - feeling to the sprite. Which is bad.
Right, so you got a trainer and threw glasses on him? Cool story.
The outline shading is choppy, the eyes, frankly, look like an internet emoticon (0.o), which isn't a good thing to have on what is supposed to be a professional presentation of art (considering these sprites are theorectically meant to be in a international-wide market). Also, Beedrill here isn't looking the right way.
Just reminding you that most of what I've said is me, adding onto what the other's have said. Please, next time consider your work and don't just brush off critique. Seriously, it's disrespectful,a nd contradicts your requests for critique. Critique isn't all about "k gud spryts maik m0r!!!!!!!11".