The Upgrade Item in Pokemon GO
The upgrade item is an evolutionary item in Pokemon GO that can make certain monsters in your pocket change into stronger versions. It's an important bridge to mastering the evolution and expanding your Pokedex.
The players can upgrade their items by spinning Photo Discs in PokeStops or Gyms seven days straight and also by completing Field Research tasks that are specific to an event. However they have a low drop rate.
Porygon2 can be evolved using this item
In Pokemon Go players can utilize a unique item called the Upgrade to evolve certain Pokemon into more powerful forms. This process involves some steps however it's not difficult to accomplish and adds an extra dimension to the game's gameplay.

One of the most distinctive Pokemon in the Pokemon franchise is Porygon that can be evolved into Porygon2 and later into Porygon-Z. These evolutions require a variety of items to unlock, including the Dubious Disc upgrade and the Upgrade. These items are rare but they are not impossible to find in the game.
The Upgrade is a scarce item that is used to unlock the second level of evolution for Pokemon Porygon in Pokemon GO. To unlock this item, players need to capture and transfer Porygon. It's best to gather as many Porygons as possible. Each capture and transfer will yield one Candy. Trainers can also obtain this item by spinning PokeStops, that have the possibility of dropping the item, along with other rewards.
The Dubious Disc, another rare item in Pokemon GO, can be used to evolve Porygon's more powerful form. To acquire this item, players must collect 50 pieces of Porygon Candy. This can be achieved by catching Porygons, then transferring them Professor Willow or walking with your Pokemon as a companion. Trainers can also spin PokeStops in order to try to hit this item, but it's a bit more difficult.
It's a fun way add some depth to your Pokemon GO experience. It's not difficult to do but you'll need some special items and money from the game.
Porygon unlike other Pokemon in the series can only change into its final form by using an item called Upgrade. This item is extremely rare and can only be obtained by spinning PokeStops, or by doing research Breakthroughs. You can also get the item if you trade a Porygon with the item or when you use a Special Trade item.
It is a Tier 4 exclusive drop
Upgrades are items that can be used to upgrade equipment, adding new attributes. The players can find upgrades in the game's inventory, karma merchants or as rewards for special events. They can be added as upgrades to weapons, armors, trinkets and gathering tools. Upgrades can be added to any slot on an item. However certain upgrades require an item that is above a certain level to be added. Most upgrade components can be replaced, but doing so will destroy the previous one. Only a handful of types of upgrade are salvageable with high-tier salvage kits like the Black Lion Salvage Kit and Ascended Salvage Tool.
Items can be upgraded by combining the upgrade item with the item that it is placed in, or rerolling it with a reroll token. The new item will have the same stats as the original, however, it will have a new level and tier. Each item has a maximum level of upgrade and a minimum level. Upgrade levels are determined by the item's tier, which is determined by its rarity as well as its level. Each tier is divided into three levels, and each level has its own amount of upgrade costs and bonuses.
Generally, upgrading an item will increase its main stat by a certain amount, and also provide an extra stat that is random. The cost of upgrading an item will increase as its tier rises however, there are discounts for certain items and the amount of upgrades required decreases with each step.
The upgrade item is obtained by spinning Photo Discs in PokeStops or Gyms. However it has a low chance of dropping every day. It can also be obtained as a reward for a seven-day streak of spinning at least one PokeStop or gym Photo Disc each day, and through specific research tasks for events.