Gruesome Guacamole

The Gruesome Guacamole is a gargantuan glob of glistening green goo, and holds the distinction of being the first true supervillain that Super Root Beer Man ever fought. It was created when some miners accidentally spilled guacamole from their lunches onto a vein of Evilite ore, which is as powerful as it is fictional. This guacamole grew into a monster that could change its size and shape at will, at one point (in its original adaptation) growing so big that it burst out of the comic book frame. Eventually SRBM was able to defeat it by creating a banana-based ethylene ripening gun to shrivel up the Gruesome Guacamole into a brown, dry husk.