Bean the Dynamite did not originate from fanon, and the information on this page may not be entirely accurate to their canon. You may read more about this subject in the context of their canon on the following wiki(s):
Bean the Dynamite is a tufted duck who makes recurring appearances in the Sonic series. Bean likes to throw bombs at his enemies, and seems to have an endless supply of them. The character was modeled after Bin and Pin, two characters in the arcade game Dynamite Dux. He is also an unlockable character in Fighters Megamix, along with Bark, and made a cameo in Virtua Striker 2 where Bean is featured in an unlockable team.