This Yu-Gi-Oh! avatar, along with the other three avatars that form the image of Mokuba Kaiba, were made by
Plz accounts are accounts that are usually inactive and that are only used for their avatars. They have the same purpose as emoticons. Their usernames usually end with "plz," which means "please." Any deviantART member can post plz avatars in comments, forums, etc.
To post an avatar in a comment, put a colon, write the word icon, write the person's username, and then put another colon. Even if the username has capital letters, capitalization is not required in this type of coding. This plz account's username is MokubaKaiba10plz. The coding for the four plz avatars that form the image is below:
iconmokubakaiba13plz: TO SEE A LONG LIST OF YU-GI-OH! PLZ ACCOUNTS, GO TO [link] !!!