|This article's title is derived from disc or cartridge data|
|... because it was never named outside of its respective game's files.|
In Kirby's Return to Dream Land, Gigatzo is a large, bottle-shaped cannon sporting a black and gray color scheme. It sits atop a red-pink stand; the rim around the front of the barrel is this color as well.
In Kirby: Triple Deluxe, Gigatzo's design is altered slightly. The cannon is now a metallic gray and is considerably more bulbous in shape. The inside of the barrel has ridges.
Gigatzo shoots giant volcanic rocks at Kirby. These projectiles cannot be defeated or inhaled and must simply be avoided. Many Gigatzos appear in the background of stages, firing rocks into the air to have them rain down on the hero. Gigatzo appears in the Wing Challenge.
It appears in the New Challenge Stages in Kirby's Dream Collection Special Edition as well. It appears in the Normal Challenge.
Gigatzo often is stationed on platforms in the backgrounds of certain stages. It behaves like it usually does, firing rocks straight ahead of it at Kirby.
Gigatzo's name is a portmanteau of "Shotzo," referencing its relationship as being of that enemy type, and "giga," referring to its size in comparison to normal Shotzos.