Target Marks: Mission 4 | Target Marks Lost Planet Guide

On a ledge to the left at the beginning of the mission.

Inside the spider-infested room, to the right of the exit.

In the room where you fight snow pirates, near the crates to the right.

Just before entering the moving platform, after dropping down from pirate base.

In the room where you find a VS after riding the moving platform.

On top of the mountain, just before the boss fight.