Fiend Listing - Monster Arena
Iron Giant is an also an “Iron Giant”-type enemy that can be found in the Thunder Plains. You need to capture five of each Iron Giant-type enemy in order to unlock Ironclad in the Species Conquest section of the Monster Arena.
There is no particularly complex strategy required to defeat them. The battle can be made easier though by using Armor Break on both of them. You can also use Dark Buster to greatly reduce the amount of damage they do.
|Sensor||“Dark Buster is effective, but beware its Reaper attack.”|
|Scan||“Targets character with lowest HP. Beware its Reaper attack, which hits all characters. No elemental weaknesses. Takes half damage from lightning. Use piercing weapons and Dark Buster.”|
They can be found in the second half of the Thunder Plains.