Mega-Mecha Gorilla
Quest reward from Inoperative Mega-Mecha Gorilla. Mega-Mecha Gorilla possesses the strength of not one, but FIVE gorillas. Mechanical type. We need to find & loot parts from five Muff's Auto-Lockers throughout for this pet (opening these treasures completes the achievement as well).
The 
Mega-Mecha Gorilla is a battle pet obtained in The War Within by collecting five mechanical parts from Muff's Auto-Lockers across Undermine, combining them, and turning in the resulting item to an expert mechanic.
Guide awaiting review
Collect Five Mecha Parts
Search Undermine for five Muff's Auto-Lockers, each containing one part: 
Mega-Mecha Fork at 23.81, 45.39; 
Mega-Mecha Grease at 71.46, 85.88; 
Mega-Mecha Gorilla Batteries at 75.14, 22.95; 
Mega-Mecha Engine at 56.66, 55.47; and 
Mega-Mecha Chasis at 34.31, 82.86. Looting all five also completes the Nine-Tenths of the Law achievement.
Combine All Mecha Parts
Once all five parts are in your possession, combine them to create the Inoperative Mega-Mecha Gorilla, which serves as a quest starter.
Turn In to Ditty Fuzeboy
Bring the Inoperative Mega-Mecha Gorilla quest to Ditty Fuzeboy at 35.4, 41.4 in Undermine to receive your Mega-Mecha Gorilla pet. If you accidentally deleted any part, you can obtain replacements from Ol' Pak Topskimmer at the Inn.
Tips
Ditty Fuzeboy also offers six other battle pets in exchange for
Miscellaneous Mechanica, so it is worth visiting even after obtaining the Mega-Mecha Gorilla.This pet is no longer cage-able, so it cannot be traded or listed on the Auction House.
