By the time you get to Spore Spawn, it's possible to get the following:
Morph Ball (Morph Ball)
Screw Attack (Bomb)
5 Energy Tanks (Right of Morph Ball, first E-Tank in vanilla, Mockball Room, Charge Beam, and Attic E-Tank)
14 Missiles (I'm not listing all of them)
5 Power Bombs (Charge Beam Missile)
I've checked the attic and the area to the right of the Morph Ball. There are simply no Super Missiles to be had. There's no way to pass the green door into Red Brinstar or the green door to the right of your ship.
By the time you get to Spore Spawn, it's possible to get the following:
Morph Ball (Morph Ball)
Screw Attack (Bomb)
5 Energy Tanks (Right of Morph Ball, first E-Tank in vanilla, Mockball Room, Charge Beam, and Attic E-Tank)
14 Missiles (I'm not listing all of them)
5 Power Bombs (Charge Beam Missile)
I've checked the attic and the area to the right of the Morph Ball. There are simply no Super Missiles to be had. There's no way to pass the green door into Red Brinstar or the green door to the right of your ship.