A secret conversation can be witnessed in Metroid Fusion. To hear it, Samus must perform a difficult series of Shinesparks in Sector 4 after she has opened Level 4 security doors, but before she obtains the Diffusion Missiles.

"During exploration of SR388, Samus is infected by an X parasite and nearly dies. A vaccine created from Metroid cells saves her, but her suit turns blue and loses most of its abilities and weapons.

Metroid Fusion Samus acquires Varia Suit and Gravity Suit upgrades during her mission, but they do not increase the suit's proportions. Instead, they change the color scheme from blue over yellow to light green over magenta (Varia Suit) and to purple over green (Gravity Suit).

Blue Hatches (Security Level 1) can be found throughout the Biologic Space Laboratories research station in Metroid Fusion. They are mostly in Sector 2 and are the blue colored doors. To open them, Samus must find the Level 1 Security Room, located in the top right corner of Sector 2.