These last few stages will bring some of the toughest platforming sections in the game. You should really make sure your sub tanks are full before attempting them. You can refill your sub tanks between stages, so use them when you need them, especially if you're having trouble with a boss.
Head right and deal with the weak flying enemies you find as you descend into the first stage. Keep an eye out for a ledge on the right. It holds a 1up. You'll reach an area with a floating platform over a spiked pit, like the ones you encountered in Wheel Gator's stage. Use charged shots to take out the Scrivers that jump up at you.
You'll climb a ladder and reach an area where the walls are closing in, just like in the intro stage. Don't waste any time, just climb straight up. Simple. Head left and up the steps, past the Barrier Attackers, to another, more complicated area with closing walls. This area zig zags a litle. You'll have to switch between the left and right walls to effectively climb. Dash jumps come in very handy.
Climb the ladders and deal with the Aclandas on the way. (Remember the Magnet Mine is great for these.) You'll reach yet another area with walls that want to crush you. This one's just another straight line, though.
The path branches here.
If you head down, you'll fight some crash roaders and eventually come to a large health pickup and a 1up. Climb a ladder to find some Barite Lastars grappling on to some floating platforms. The walls are electrified so you'll have to take out the enemies and climb the platforms to ascend. Once you reach the top, climb the ladder and head right.
Alternatively, you can head right at the crossroads for a shorter, easier, simpler section, but there's no health pickup or 1up this way. There are claws (again, like in the first stage) that will try to throw you down into the lower path but they're easy to avoid by holding right and just wall jumping when they let go of you, or just air dashing over them in the first place.
Whichever way you go, both paths converge on another are where the walls close in. This one is crooked like the second one, so use your dash jumps to make it to the top. Use a Magnet Mine on the Aclanda here and head through the boss door.
NEXT: X-Hunter Stage 2