Mecha Biome

"You hear loud quacking from deep underground..."

The Mecha Biome is an Extreme Mode (My Version) biome created when the Wall of Steel (My Version) is defeated.

Enemies:
Iron Slime (My Version)

Mad Zombie Scientist

Guardian Prime (Mini-Boss)

At Night:

Computer Eye

Bosses:
Skeletron Prime MK-II

The Triplets (My Version)

The Destroyer of Worlds

Cores of Mechanisms

Honeykeeper

Titanium Golem

CoreTera

(Enraged) Ocram

Notes:
-The "CoreTera" is a portmanteau of "Core" and "Plantera".

-Ocram in reverse is "Marco", which is a reference to the developer who made Ocram.

-Guardian Prime cannot be found after beating Skeletron Prime MK-II, since the boss protects the Mech Dungeon.

Also see:
Mechanical Dungeon (My Version)

Mechanical Jungle (My Version)

Underground Mechanical Jungle