You missed a golden opportunity to have "Back again" as the only words on that post.

It's weird to see Arthur so dull. It's definitely been improving as time has gone on.
The others are kinda hard to see all bunched up, though.

i like the bear

You're definitely one of the most talented artists here but let me give some critique.

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1) Colors

Refrain from using 0 Saturation pure black for hair, etc. The hero's color scheme is blue so you need to unify your palette with every color nearing going towards blue in the hue department. This is called hue-shifting. It gives your piece complexity and doesn't make it look like a kid colored the lines in with crayons.

Example: [ Image ]

You also used a 0 Saturation gray for the inner clothing which I gave a bluish-green (teal?) color instead, to complement the blue at least.

Your sprites are very detailed but there is little contrast between colors that forces you to use multiple shades for a single form. Your gray inner clothing makes use of 4 shades which is very unnecessary.

2) Shading

You should making it a point to differentiate the material of each form you are shading. So far everything seems to be of the same material, armor needs to be shiny so make it shine.

3) Facial Expression

The face on the sprite looks bored and uninterested. You need to give him eyebrows as well. A detailed sprite like this deserves to have a nose as well.

4) Form, Shapes, and Proportions.

Right now is very skinny and the body parts and limbs are all squeezing together. You need to give the character space to breathe and move.

As you can tell, I only made some details in the top 1/4 of the sprite. I was just giving an idea on how to improve the sprite and correct its flaws. It is definitely good pixel art though and I commend you on your improvement as an artist.

Note:

The problem with these kinds of sprites without outlines and little contrast is they can NOT be grouped together in a piece like this:

[ Image ]

To be able to read them you need to put more contrast like in your previous spriting techniques.