Mechamatic Guardian

Overview

The Mechamatic Guardian isn't technically a static zone, it is instance only. To gain entry speak with Overvolt Rigster the IV. You can enter via a generic instance (key phrase "head into") where the entire zone is populated and has a 20ish minute respawn, or via one of his specific missions where only a set floor is populated and no respawns. Rare mobs only spawn in the generic version and don't spawn until you have killed around 15 trash mobs.

The zone is roughly split up into floors separated by teleporters. After each there is a ground spawn item, Guardian Expediator Mark I to IV, which can be used to teleport to the floor (Mark I to second floor, Mark II to third, and so on). The easiest way to collect these is to do Overvolt's specific missions so you don't have to clear your way up. Then you can port to any floor directly as needed in the generic instance.

In all instances any mob can very rarely drop:

Rare Mobs

Rare mobs only spawn in the generic version of the zone and not in any of the missions. The rares or their ph's do not spawn until 15 trash mobs have been killed to prevent chain spawning.
Coleoptera Assault Sweeper
Spawns on the top floor. Casts Rust-Tainted Bite - Single target 700 dot, attack debuff, and healing reduction.
Drops - Coleoptera Mechanical Beetle Eye, Chest Armor
Fuzzbert Cogsworth
Spawns on the third floor. No combat information beyond casting Wizard spells.
Drops - Hollow Steamwork Finger, Silvered Ring Gear, Fuzzbert's Power Finger, Fuzzbert's Heart Ring Gear
Gearlord Memorantis
Spawns on the fourth floor. Hits for just under 2k, no info on spells.
Drops - Mechanical Dragon Heart, Leg Armor
Jon E V
Spawns on a lower floor (2nd?). Can proc Mechanomagical Punch, a 6k dd and flux, and cast Jet of Flame, a frontal 10k dd.
Drops - Chain of Gears, Exoskeleton Backup Short Sword, Jon E's Control Device
Mechano Sendaii Dronequeen
Spawns on the fourth floor. No combat information.
Drops - Mechanical Spider Drone Core, Arm Armor
Metal Slime
Spawns on a lower floor (3rd?). Casts Ooze Swarm, summoning 2 short duration pets.
Drops - Slime Covered Paulder, Hardened Slime Cudgel, Metal Slime Etched Paulders
Steam Engineer LIIV
Spawns on the first floor. No combat information.
Drops - Flexible Boilerplate, Pointed Control Shaft, Engineered Boilerplate
THE Destructorizor XOOX
Spawns at the end of the second floor. Can proc Mechanomagical Punch, a 6k dd and flux, and cast Jet of Flame, a frontal 10k dd.
Drops - Energized Silver Gear, Destructorizor Power Core, Wrist Armor
Whirlie Fizzlebot
Spawns at the end of the second floor. No combat information.
Drops - Strong Propeller Drive Belt, Main Whirlie Propeller Shaft, Fizzlebot's Propeller Drive Belt