The Egg Viper is a vehicle mentioned in the Sonic the Hedgehog comic series and its spin-offs published by Archie Comics. It was a battle mech created by Dr. Eggman and used to fight Sonic the Hedgehog.
Sonic faced the Egg Viper in battle at the Final Egg near Mystic Ruins, defeating it after an intense battle. He would mentioned the Egg Viper to Mega Man during their adventures through the Skull Egg Zone. Realizing that the Egg Viper was exclusive to the Post Super Genesis Wave timeline was one of the first indications to Sonic that his memories of the old timeline were being overwritten.
- The Egg Viper is acknowledged as one of the more difficult bosses in the Sonic video games; Sonic's comments in Mega Man #26 in terms of it being a better opponent to the Snakeys of the Mega Man games may be a nod to this.