Fido Dido is a cartoon character created by Joanna Ferrone and Sue Rose. Rose first developed the character in 1985 on a napkin in a restaurant. They later stenciled Fido on T-shirts with the credo: "Fido is for Fido, Fido is against no one". These T-shirts became very popular in New York.
Fido Dido was licensed to PepsiCo in around 1988, but the character did not receive much attention or popularity until the early 1990's on numerous products, particularly stationery. Later, he was replaced with Cool Spot as the brand-new mascot. Much like him, he also got a Genesis game, called Fido Dido.
WlanmaniaX edited Fido Dido because it looked unfinished. It has new sprites, new states, and sounds. In 2012, WlanmaniaX updated his edit to fix elements such as sprites and the standing medium kick, and new sounds were added, although, his gun hyper causes the enemy to freeze up if they are hit by it. However, he hasn't made the hypers any less generic.