Volkan Cannon

From Sonic Retro

The Volkan Cannon was first introduced in Sonic Adventure 2. It is one of the main weapons of "Tails"' Cyclone and Dr. Eggman's Egg Walker. It fires a small metal projectile and can destroy wooden crates. It can be upgraded (with the Bazooka for "Tails", and the Large Cannon for Dr. Eggman) to destroy steel crates as well.