The attack patterns of the Demos and Zub Rush are the same but they vary depending on how many Zubs are onscreen at the same time. Gradius III arcade increases the danger level of Zubs by allowing them to fire bullet spreads and also appear in fewer numbers, meaning less chances for powering up. On higher loops, in most games they fire suicide bullets.
- Demos was replaced by the normal Zub Rush miniboss in the Boss Rush of the SNES version of Gradius III.
|Stages||Desert • Bubble Zone • Volcanic Planet • High Speed Dimension • Moai Zone • Cell Planet • Prominence Planet • Plant Planet • Crystal Zone • Boss Rush • Mechanical Base|
|SNES exclusive stages||High Speed Zone • Fortress • Cell|
|Bosses||Goliath • Bubble Eye • Godrei • Big Core MK III • Dogas • Vaif • Twin Vaif (SNES) • Gregol • Wyvern • Vulture Dragon • Choking Weed • Lizard Core • Beacon (SNES) • Tetran • Covered Core • Big Core MK II • Crystal Core • Death MK II • Dellinger Core • Disrupt • Shadow Gear • Shadow Gear MK II (SNES) • Big Core • Golem • Bacterian|