So after dying on the stage 3 FUCKING TIMES (I usually die maybe once) I clear Mugetu using only one bomb.
So I get to Gengetu, 1 bomb on her first phase, 2 bombs on her second (I have no idea what to do here) and I get to her third phase for the very first time!
and then I died 3 times on it and game over
First phase: Trust your hitbox. That's all that really needs to be said.
Second phase: If she's on the left or right side of the screen when she's firing the fast wall bouncing bullets, line up under her or stay in the corner. Then watch out for the straight-falling bullets. The white bullets are aimed at you.
Third Phase: Move as little as possible for the first part, stream and graze the bullets. Move just a tiny, tiny bit in either direction for the triangle-shaped fan of bullets, they'll all miss you. You can get an extend or two if you ride this out for a while. You'll want them.
Fourth Phase: Pray. Dodge the fast spread if you can, then line up in between the lines, bullets will fall straight down. Move vertically in this spot, because she'll shoot an aimed shot during everything. Oh, and do NOT go under Gengetu during this part or you'll regret it.
The rest is pretty easy.