How to change Icons?

[puggsoy]

That's actually not a very good icon for the sheet. As it says on the wiki, "the icon should give a quick idea of the content of the sheet, and not contain any sprites not present in the sheet". This usually means one frame of the sprite (and maybe multiple sprites if the sheet contains more than one character), with transparency. Screenshots are only used as game icons.

Besides, the current icon looks fine:

Meta Knight