LogFAQs > #956694723

The "virus stages" as they're called are a pain, and an eye sore. Everything is a callback in some form. Stage 1 is based on QuickMan with the Shadow Devil as the boss. Stage 2 has elements from Sigma Stage 1 from X1, and you fight Rangda Bangda MkII (the wall face thing from X1, Sigma Stage 2). Stage 3 is mostly spikes and rope grabs. This is the only one you need to enter as plain X to get the armor. The fight against Zero is epic (because of the music). The boss rush is just tedious. and finally Sigma himself whose forms are a callback to X1 form 1, and Gamma, the final boss of MM3.

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