|Skull Barrier's concept art in Mega Man 4|
The Skull Barrier is a shield-type weapon obtained by defeating Skull Man. When used, a number of skulls will surround the player character, absorbing a single projectile or dealing damage to any enemies that touch it. After touching a target, it disappears.
In Mega Man Maker, the shield gained an additional protection against spikes. As long as the shield is maintained, the player can touch spikes from any direction - however, the shield does not protect from other sources of instant death, such as red Force Beams or crushing. The shield will also deactivate upon entering a screen transition, so beware staying on the ground when walking across spikes in multiple rooms with it equip.
- Skull Barrier's shield also protects the player from ignited oil, as it also behaves similarly to spikes.
- In Mega Man 4, the weapon doesn't protect the player from spikes.