SomecallmeJohnny on Twitter: "Now, do you NEED to have Fusion Mode? No. It's a Samus Must Die difficulty. Not everyone's into that, or don't care. It's still something that shouldn't be locked
Metroid: Samus Returns - First 5 Minutes of Fusion Mode - YouTube
Nintendo Talks About The Metroid: Samus Returns Amiibo Figures - My Nintendo News
Finishing Fusion Mode in Metroid: Samus Returns was Worth the Third Playthrough. : r/Metroid