Farming Location: Can be found from any gathering spot that can hold ore.Purchase Location: Sold from the Materials Shop in Facade for 800 gold.Total Number Required for Upgrades: x18.Farming Location: Rare drop from armored adult shades that appear in the Northern and Southern Plains.
Northern and Southern Plains are a good farming spot, as is the Underground Laboratory below Emil's Mansion.
Purchase Location: Sold from the Two Brothers Weaponry Store for 1,100 gold.Farming Location: Drops from the adult magic-casting shades that can be found in the Northern Plains (during cloudy weather) or at the top of the Lost Shrine (close to where you do the Magical Stone quest).Farming Location: Common drop from flying robots on the B2 level of the Junk Heap.Farming Location: Common drop from regular robots in the Junk Heap.Total Number Required for Upgrades: x49.Farming Location: Common drop from regular robots in the Junk Heap.Total Number Required for Upgrades: x37.Farming Location: Rare find from the gathering spots on the beaches in Seafront.Total Number Required for Upgrades: x15.Farming Location: On the B2 floor of the Junk Heap, head to the northernmost area of the first map where there are lots of crates and holes in the floor - these crates have a chance of giving Amber.Purchase Location: Sold from the Materials Shop in Facade for 6,000 gold.
Complete List of Weapon Upgrade Materials And Their Farming Locations Amber