Ptoing, thank you very much for your comment ^^ and for your advice "Press F1" and I say this without irony; I´m learning a lot, this month I´ve learned the use of the tiles in Promotion, and I´m impressed for this functionality, I hope to post soon my first mockup ^^

Reminds me of the heads in Spirited Away! 

The easing is pretty good on the opening but there should be a
least another frame before going back down, it's giving a snap feel.
Not the bite kind of snap, the kind where it's like an animation opening
it's mouth and that's the end of the animation so it opens it's mouth again
after reaching the top.

Anyways, top notch job.

Hahaha, this dude is awesome.  

hehe It´s a pleasure X3.

You have good eye because is true, the best is the small; maybe by the size, and is the last and I´ve controlled the AA better. I need to redo the biggers, thanks!

 I saw this on dA (we meet here too x3) I love it, just the way it opens his mouth. the best one is the mini, so cute!

I´m agree with you M, pillow like a rookie XD, this week I´ll remake it, and ad a new as a bonus (I´ll add a piece of brain in your honor ^^)

Hmm, ya know what . . . the largest one is awfully pillow shady. It may enhance it a bit to move the strongest highlight color to more of the top of the shape it's right now in the middle of. Maek sence?

Sneep29 - Thank you very much! I appreciate your comment ^^ and your new avatar is gorgeus!

Very smooth animation. What an accomplishment, it just looks perfect.

Maybe just make a size between it and the largest giving you 4 total

thanks, but I´m thinking in increase the size of the middle, (maybe it isn´t a good scale) what do you think about this?

So cool! and three sizes available.

S.Barbarie - Thanks Snes was a sprites paradise ^^

Great idea,,, How do you imagine that P1-with a hammer?

GormenGhast - Thanks, but sorry, I dont know that game, would you like to give me a link, please? thanks

Deeply creepy. Awesome. Reminds me of that crazily scary boss in Faxanadu that guarded the Black Onyx.

Mathias, thank you, but now I think the monster on the middle is too small, oh, and the really BIG version is in progress XD

It multiplied! I loved scaled versions of things like this. Nice set. They look very hungry.

dumbo - thank you ^^ I´m near to finish this ^^

Very cool piece! I almost missed this one.

one more added, Im waiting your comments :)

thanks, now I´m making the Final Boss version ^^

Awesome work for a video-game ;)

its true,,, the eyes look a bit static, now I´m working on it, thanks! ^^

The colors are perfect now!

But the eyes look a bit static, what about making them more open when the mouth is open at its widest.

The small version is nice and readable

I need your criticism of the child, thanks

Thank you very much for appreciating this ^^ I´m tryng to make a technique with the more less frames-palette-shading. thanks again.

Amazing... I really love how you managed this animation in four frames...

Mathias ,thanks, its like our Big Fat Upload Collab XD

@Drazelic - Thank you very much thanks to your advices

Big FAT improvement!

I like it! The decision to change the green innards to black helps a lot too and brings the piece together.

Drazelic - Now I´ve done what you said, Please would you like to tell me how it looks now? thanks ^^

Mathias- now he bites, but I´m thinking about spit... I dont know yet...

IIII- Thank you ^^

sorry, someone knows why in my gallery says "user" ?? I can´t see my preview XD

Nvision, Thank you very much, is true, Now it looks great, I dont forget this on the future, thanks

Nose moves so well. good angles

2 - Oh, he's spitting, that's different. If you added some spitty saliva or something launching out from his mouth when it opens it would clear that up. Right now, it's confusing.

Try swapping out the darkest colour outline along the top of the head, and perhaps on the cheekbone, with a lighter tone from your shadows.  It will give better depth/sense of lighting and negate the need for more AA along those areas (which is where aliasing is most noticeable).

Mathias -

1 -I´m working on the eyes,

2 -ok, at the start I cant select ( he bite or spit, now is more like a spit, is that you mean?)

3 - any suggestion? thanks

Funny monster. The eyes seem unfinished, especially eye on right when the mouth opens.

Seems like he should close his mouth when he thrusts forward, as if to bite, not close it when he seats back down.

The bright green in the mouth doesn't work for me.

Piiichan - "Some highlights on the cheek bones..." - Im working on it now, thanks ^^

"Love the color of the teeth," - me too, I´ve tried 20 variations XD

"but is the green inside the mouth serving any purpose?" I think its a dark magic, or toxic gas, I dont know yet, you don like it?    and thanks for your comments ^^ 

Some highlights on the cheek bones and forehead might be good.

Love the color of the teeth, but is the green inside the mouth serving any purpose?

Nvision, Thank you , but I really dont understand "Might benefit from some minor selective outlining along the top edge" would you like to explain me this comment again?, thank you ^^

Vaya, pues a menos que sean hermanos, (si no, caeríamos en incesto [ q para algunas series esta bien ^^U ]) deberíamos presentarlos a ver que pasa (esto no es un payaso, es un actor de Kabuki)

Feels felshy and solid...very good work.  Might benefit from some minor selective outlining along the top edge.

Drazelic - Thank you very much, I think you´re right, I´m working on it

Joder que miedo da , parece lo que hay debajo de mi cama

I'm not sure I like how the nose is the only part to use the lightest color in the pallete. Spreading it across the forehead at least may be interesting.

eyadan - Muchisimas gracias compañero, y te deseo feliz año por cierto, aprovecho que este es mi Facebook jeje

Drako - thank you very much ^^

jajaja hostia que wapo, lo habia visto en la barra de new pixel art y no se por que pero sabia que era tuyo, muy wapo tio, te superas cada vez!

yeah, it's funny!:d and very good work.