Egg Sub

The Egg Sub is a vessel that is briefly used by Doctor Eggman during the Hunt for the Chaos Emeralds. As he is chased through the city sewers, the Doctor summons and boards the Egg Sub after losing his third Eggmobile; he then proceeds through the underground tunnels, but not before Sonic jumps atop the Egg Sub and uses Spin Dash to ram into it and slow it down, allowing the rest of the group to catch up and attack as well. While being chased by Tails and Mario, the Doctor fires countless rounds of ammunition at Tails, who dodges them all, before the Egg Sub is struck by one of Mario's hammers, and is promptly destroyed.