If you're saying they're too small.

Modify these two things in the constants.cns file
It Should have: "xscale = 1" and "yscale = 1"
Change the values of 1 in either of these or both to 3 (may recommend that) or whatever size you prefer
In a later update. I will size them up to 3 by default (But not in the full game)

If you do not see any explods in action in 1.0 such as: Mama luigi not appearing in one of the intros or SMW TV Mario's Juggling act (The balls he juggles).
Its mostly cause I've been way used to 1.1 than 1.0.
Despite it does say 1.0 for most of the .def files. 

Click on the Download button below the character name to get the character (Just make sure to click download once the redirect is in effect)

Note(s)

.Defs
The 1.0 def also works for 1.1 (Not modded such as the (In) famous k.y shanxi's SSB Mod)
Do not use the later defs in winmugen. Due to how some pieces of the code is not meant for winmugen. Otherwise it will crash. Use the winmugen def file.
They also come with a readme file (albeit: wordpad): in order to know their specials and supers/hypers.

AI
In order to adjust the ai: Theres 4 options inside their statedef -2.
Main: WinMugen Users has to do that manually.
(1.0 and 1.1 users can either ignore that since it uses the built in options menu for ai difficulty and/or simply modifiy a bit of the AI for something like)
Basic: Often aimed for the simple punching and kicking
Special: Fireball, Uppercut .etc
Super: Super Fireball, .etc
Example: You could have a efficient Usage on Supers. But doesn't combo much

or simply. Wombo Combo and use supers and specials often.

Version
Pay attention to the character you have downloaded. (In the readme)
if it's an outdated version. Redownload the character to get the up to date version.
In later revisions (Specifically) there is a changelog file (It may not list everything but at least it should let you know what has changed)

Most feedback will be accepted too. (I'm trying my best.)

Typical stuff you see.

Note: Since the downloads are now convereted to MEGA. Make sure you download them as a .zip

May not always have this Super Armor or have all the things yet. (They're also playable)

Another typical thing

Coming soon!

Consider some of these a future work in progress.

Feel free to watch them to see things in action.

Or just use this to see all of them in one Playlist of Videos of MUGEN Mario World.