The first 1 is in underground forest, when the two gyrator are. Destroy the second, and
fly up, there's a subtank.
Two other subtanks are to trade by the fourth reploid with two S-Crystals.
The last 1 is in the IceLevel, there you have to go at the beginning up, and when theres
the "Hole" you have to jump down and go trough the door. Then grab with the Z-Knuckle the
chip from the crab. Then go to the door with the electric grills and attack with the chip,
in the room theres the last one.

where are the thired and fouth subtanks i need them to beet the last boss