Eventually, the player will reach the area in which the Vic Viper originally endured the Volcano, but instead, Iron Maiden replace the former as a Sub Boss of the level. In the NES version, though, the Volcanoes reprise their role as Sub Bosses.
After defeating Iron Maiden, Big Core will appear as the boss, as usual.
- Strangely, the Volcanoes are only fought again, inverted in the NES version. All other versions features the aformentioned Iron Maidens.
|Stages||Stage 1 • Stage 2 • Stage 3 • Stage 4 • PC-E Exclusive Stage • Stage 5 • Stage 6 • Stage 7|
|Sub Bosses||Volcano • Zub Rush • Mother and Child • Iron Maiden • Tentacle Golem • Electronic Cage|
|Bosses||Big Core • Cell Nucleus • Xaerous Brain|