The Upgrade Item in Pokemon GO
The upgrade item is a special evolving item in Pokemon GO that can make certain monsters in your pocket change into more powerful versions. It's an essential bridge to mastering evolution and expanding the Pokedex.
The players can upgrade their items by spinning Photo Disks in PokeStops or Gyms all day long, as well as through Field Research tasks that are specific to an event. These items are rare, but they do drop.
Porygon2 can be evolved using this item
In Pokemon Go players can use an item called Upgrade to evolve Pokemon into more powerful versions. This isn't a difficult process however it requires some steps. It adds a new dimension to the game.
One of the more unique Pokemon in the Pokemon franchise is Porygon that can be evolved into Porygon2 and then into Porygon-Z. To unlock these evolutions, you'll need have a few things. These include the Upgrade disc and Dubious disc. While these items are rare however, they're not impossible find in the game.
The Upgrade is a rare item that can be used to unlock the second stage of evolution for Pokemon Porygon in Pokemon GO. To get this item, players need to capture and transfer Porygon. Each capture and transfer will give one Candy, so it's best to gather a large amount of the critters. Trainers can try to collect this item by spinning PokeStops. These have a chance to drop the item, along with other rewards.
The Dubious Disc, another rare item in Pokemon GO, can be used to develop Porygon's more powerful form. To acquire this item players must collect 50 pieces of Porygon Candy. This can be accomplished by taking a Porygon, taking them to Professor Willow, or walking with the Pokemon as their companion. Trainers can also spin PokeStops in order to try to get this item, however it's a bit more difficult.
The evolution of a Porygon into its secondary form is a fun process that adds depth to the Pokemon GO experience. It's not too difficult to do but you'll require some special items as well as in-game currency.
Unlike most Pokemon in the series, Porygon can only be transformed into its final form with an item known as the Upgrade. This item is extremely scarce and is only available through PokeStops or by doing Research Breakthroughs. You can also obtain the item by trading the Porygon with the item attached or when you use a Special Trade item.
This is a special drop from level 4.
An upgrade item is a product that is used to enhance equipment by adding additional attribute bonuses. Upgrades can be found in the game's Inventory from karma sellers, or as rewards for events. They can be added to weapons, armor, trinkets, and gathering tools. Upgrades can be placed into any slot on an equipped device. Certain upgrades require that an item of a higher level be added. The majority of upgrade components can be replaced however, doing so could destroy the previous one. Only a handful of upgrade types can be salvaged by using top-tier salvage tools, such as Black Lion Salvage Kit or Ascended Salvage Tool.
Upgrades can be achieved by either by combining an upgrade item with the item it's placed into or by rerolling the item using the rerolling token. The rerolled item will have the same stats as the original and features a different tier and level. Each item comes with an upgrade level maximum as well as a level minimum. The item's rarity and level determine the tier. item upgrades is broken up into three levels, and each comes with a distinct amount of upgrade costs and bonuses.
Generally, upgrading an item will increase its primary stat by a predetermined amount, and also provide a random extra stat. As an item's tier increases it will cost more to upgrade it will increase. However there are discounts on certain items and with each step, the number of upgrades needed will decrease.

The upgrade item can be obtained by spinning Photo discs at PokeStops and Gyms but it is unlikely to drop every day. It can be earned by spinning at least one PokeStop Photo Disc or gym Photo Disc each day for a 7-day streak, as well as through research tasks and other task-specific events.