Zero Side:

Wire Sponge Heart Tank: At the start of the stage, you need to wall jump to the left pillar to get Heart Tank, easy.
Wire Sponge Capsule (Leg Part): When you go to the first elevator section, drop down and DI to the right.
Wire Sponge Sub Tank: After the crystal ball that changes the weather, wall jump to a spot where you can see a Croak Hopper, then go to the right. You will see a Sub Tank.

Overdrive Ostrich Heart Tank: At the second riding sequence, you will a two way path, if you go to the bottom, then you will get a Heart Tank.
Overdrive Ostrich Capsule (Head Part):When you are about to go to the second riding sequence, air dash to the left, then go to the right.

Blast Hornet Heart Tank: After the checkpoint, you can go down the ladder and board the ships to get to the Heart Tank.
Blast Hornet Capsule (Head Part): Right after the sections with the ships, you can see some Turn Cannons and a Flamer. Leave one of them alive and use the Drill Crush on the three blocks.

Tunnel Rhino Heart Tank: When you get the mech, you need to glide all the way to the right, then jump off when you see the Heart Tank.
Tunnel Rhino Capsule (Arm Part): When you fall down a hole with the mech, go to the VERY left. Then jump off the mech. You need to use the Lightning Technique to break the blocks. 

Hi there. Unfortunately we don't allow the splitting of guides unless they exceed 20.000 words. 

I'm afraid I'll have to remove this part, but feel free to edit this and any future parts you had planned into your part 1.