Gunner Wall is a gunwall and it is an upgraded version of Demos from Gradius II. Like its predecessor, it has only one giant core, but this version is only protected by four barriers, instead of seven for the Demos. Gunner Wall also reappears as a boss in Otomedius Excellent.
The Gunner Wall attacks with its multiple lasers and will send out drones to attack the player. After a while, it will charge forward and fire a small wave of lasers straightforward to trap the player's ship until it moves back and repeats the cycle all over again.
This type of Gunwall lacks hatches, unlike Demos in Gradius II. It contain fighters inside his hatch.