The Upgrade Item in Pokemon GO
The upgrade item is an evolving item in Pokemon GO that can make certain pocket monsters evolve into stronger versions. It's a key way to master evolution and expanding the Pokedex.
Players can purchase upgrade items by spinning Photo Discs at PokeStops and Gyms for seven days in a row, and also by completing event-specific Field Research tasks. However they have a low rate of dropping.
It is used to evolve Porygon into Porygon2
In Pokemon Go, players can use a special item called the Upgrade to evolve certain Pokemon into more powerful forms. The process isn't difficult but requires some steps. It gives a new dimension to the gameplay.

One of the most distinctive Pokemon in the Pokemon franchise is Porygon, which can be evolved into Porygon2 and then into Porygon-Z. To unlock these changes, you'll need have a few things. These include the Upgrade and Dubious disc. These items are rare but not impossible to locate 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 get this item, players need to capture and transfer the Porygon. Each capture and transfer will result in one Candy and it is recommended to gather a large amount of the creatures. Trainers can try to collect this item by spinning PokeStops. They are likely to drop the item, along with other rewards.
The Dubious Disc, another rare item found in Pokemon GO, can be used to evolve Porygon's more powerful form. To obtain this item, players have to collect 50 pieces Porygon Candy. This can be done by collecting Porygon, transfer them to Professor Willow, or walking with the Pokemon as a companion. Trainers can also get this rare item by spinning PokeStops, although it's a little more difficult to find one.
It's a fun way add some depth to your Pokemon GO experience. It requires a few unique items and in-game currency but it's not overly hard to accomplish.
Porygon, unlike most Pokemon in the series can only change into its final form using an item called Upgrade. This item is incredibly rare and can be found through PokeStops spinning or doing research Breakthroughs. You can also acquire the item if you trade the Porygon with the item, or if you use a Special Trade item.
It is a tier 4 special drop
Upgrades are items that can be used to enhance equipment by adding new features. Upgrades can be found in the inventory of the game, from karma merchants or as rewards for events. They can be added to armor, weapons trinkets, trinkets, or gathering tools. Upgrades can be added to any slot on a unit. However, some upgrades require an item above certain levels to be added. The majority of upgrade components can be replaced, however, doing so could destroy the previous one. Only a handful of types of upgrade can be salvaged 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 upgraded item will have the same attributes as the original however, it will have a different level and tier. Each item has an upgrade level maximum and level minimum. item upgrades are determined by the item's level, which is determined by its rarity as well as its level. Each tier is broken down into three levels, and each comes with a distinct amount of upgrade costs and bonuses.
In general upgrading an item boosts its main stat by a certain amount, and offers a random additional stat. As the tier of an item increases, the cost to upgrade it will increase. However, there are discounts for certain items, and with each upgrade, the amount of upgrades required will decrease.
The upgrade item is obtained by spinning Photo Discs at PokeStops and Gyms however it is very unlikely to drop each day. It can be earned by spinning at least one PokeStop Photo Disc or gym Photo Disc every day to earn 7 days as well as by completing Research Tasks and task-specific to events.