Yeah, when right before facing the Mother Brain, you can do some cool stuff. First, go into her room and kill all of those annoying thing that you need to use Missiles on (Cannot remember name of those things, they block your way). Well, anyways, kill them and save. Then, you can revisit her room with all of them destroyes. Now, go back in the long room with the Rinkas (Cherrios) and enter the save room. From there, charge up a Shinespark and enter the Mother Brain's room. on the very first platform, jump and shinespark left, making you pass the cherrios and tiny shots. Then, when you hit the wall, jump extend (yes, it can be done on Zero Mission) so you can grab onto the ledge. This means that you can easily pass by teh Mother Brain's room and have enough energy to beat here! (I used this on hard mode, it really works!)
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