What is an Upgrade Item in Genshin Impact?
Upgrade items are a particular kind of item upgrades that ensure that Pokemon evolve. They can be obtained by spinning Pokestop discs, and also as rewards for events that are related to evolution.
They can be slotted into armor, weapons, trinkets, and gathering tools to give additional stats or effects. Some item upgrades also have the appearance of a certain cosmetic when employed.
Upgrade components
Upgrade components can be inserted into armor, weapons and trinkets for an added bonus or effect while the equipment is used. They can be bought from vendors, looted, or received as rewards. They can also be crafted, dropped, or obtained by crafting. Upgrade components must be higher leveled than the item upgrade they are added to. Most also require that the Best item upgrader be equipped with an upgrade slot. Upgrade components can be replaced with other upgrade item components, except for glyphs and inscriptions which can only be removed or added freely.