All right, this is what I got in a short period of time:

1 is the original, 2 is your edit, then 3 is my edit to yours. Again, I did it in a short time so I'm still working on it. Where else do you see that need fixing?

Yo, that's already loads better.

The mustache, hair and ear would benefit from some more attention, and you might want to consider having the mustache cast a shadow on the face and the lab coat cast a shadow on the pants.

You might also want to revisit the pill :P

Really good improvement though.

I think this might be the last one (unless someone think that there's something to fix):

A WIP of the Dr. Mario's taunt from SSBM. Need to fix some pixel placements (especially in the shoe area). If you find something that need fixing, just let me know.

could slow it down a bit and also add some frames where the pill is at an angle that isn't just 90 degrees from the last frame

Something like this?

Love your roy

Looks good, but I think the pill could spin a bit more.

Actually it looks like Mario's head should move more.

So I was going to work on fixing Dr. Mario taunt animation and a few special attack sprites, but then v0.9b was released and I got extremely distracted. This is also a good thing since I can get some more animation sprites for the Doctor, though I'm still going to make some custom moves. But for now here's a mock-up Dojo page of Dr. Mario:

Remember that this is a mock-up, meaning it's only a model and is completely fanmade. This is no way real or official. If this is against the rules of the forum, then I will take it down without question (though if you link me where it says it's against the rules that it would be great since I'm looking for it).

I got a rough idle animation done:

There's something about it that doesn't sit right with me, so I'm going to mess around with it.

Not bad, but improvements could be done to the dojo page; it is pretty well done though!
I think if you're gonna post the Mario sprites though, you should up-scale 'em, so people won't steal SSF2's assets.

Yeah, the dojo page was more of a little side project (which took very long since I copy/paste each letter into words since I couldn't figure out which font they used and losing all my work once). As for the Mario sprites, it will only be used for comparison of the idle, but I understand what you mean and updated them.

I felt like that I needed make something for Luigi, so I did:

Any suggestion to make it better?

It's really good, I suggest maybe editing the eyes, as they seem stretched out.