The Upgrade Item in Pokemon GO
The upgrade item is a special evolutionary item in Pokemon GO that can make certain pocket monsters change into stronger versions. It's an important step to mastering the evolution and expanding your Pokedex.
The players can upgrade their items by spinning Photo Disks in PokeStops or Gyms all day long and also through Field Research tasks that are specific to an event. These items aren't common, but they do drop.
It is used to evolve Porygon into Porygon2

In Pokemon Go players can use an item called Upgrade to transform their Pokemon into more powerful forms. The process isn't difficult however it requires some steps. It gives a new dimension to the gameplay.
Porygon is one of the most unique Pokemon in the Pokemon series. It can be transformed to Porygon2 or Porygon-Z. To unlock these changes, you'll need have a few things. These include the Upgrade and Dubious disc. These items aren't common, but they are not impossible to find in the game.
The Upgrade is a rare item that is used to unlock the second level of evolution for Pokemon Porygon in Pokemon GO. To obtain this item, players must to capture and transfer Porygon. Each capture and transfer will give one Candy, so it's best to collect a large number of the creatures. Trainers can try to obtain this item by spinning PokeStops. They are likely to drop the item, together with other rewards.
The Dubious Disc, another rare item that is found in Pokemon GO, can be used to improve Porygon's powerful form. To obtain this item, players need to collect 50 pieces of Porygon Candy. This can be achieved by catching Porygons and transferring them to Professor Willow or walking with your Pokemon as a companion. Trainers can also spin PokeStops to attempt to hit this item, however it is a little more difficult.
It's a great way to enhance your Pokemon GO experience. It's not too difficult to do, but you will require some special items and money from the game.
Porygon, unlike most Pokemon in the series, can only change into its final form using an item called Upgrade. It is extremely scarce and can be found by spinning PokeStops or completing research Breakthroughs. You can also get the item when you trade a Porygon with the item attached or if you make use of a Special Trade item.
This is a unique drop from level 4.
Upgrades are items that can be used to enhance equipment, adding new attributes. Players can find upgrades within the game's inventory, in karma merchants or as rewards from special events. They can be added to weapons, armor, trinkets, and gathering tools. Upgrades can be added to any slot on an item. However, some upgrades require an item above an aforementioned level to be added. The majority of upgrade components can be changed however the original component will be destroyed. Only a few upgrade types can be salvaged using high-tier salvage tools, such as Black Lion Salvage Kit or Ascended Salvage Tool.
Items can be upgraded by combining the upgrade item with the item it is placed in, or rerolling it with a reroll token. The upgraded item will have the same stats as the original, but will also have a different level and tier. Each item comes with an upgrade level maximum and level minimum. Upgrade levels are determined by the item's tier which is determined by its rarity and level. Each tier is divided into three levels. Each level comes with its own upgrade cost and bonuses.
In general, upgrading an item increases its primary stat by a certain amount and gives you a random extra stat. As an item's tier rises it will cost more to upgrade it will rise. However there are discounts on certain items and with each upgrade, the number of upgrades needed will decrease.
The upgrade item can be obtained by spinning Photo discs at PokeStops and Gyms however it is unlikely to drop every day. It can also be obtained as an incentive for a seven-day streak of spinning at least one PokeStop or gym Photo Disc per day, and through event-specific Research Tasks.