The Upgrade Item in Pokemon GO
The upgrade item in Pokemon GO is a special evolution item that can help certain pocket monsters increase their power. It's a crucial step towards learning the evolution and expanding your Pokedex.
Players can acquire upgrade items by spinning Photo Discs at PokeStops and Gyms for seven days in a row, and through specific event-related Field Research tasks. These items are rare but they do drop.
It is used to evolve Porygon into Porygon2
In Pokemon Go players can utilize a unique item called the Upgrade to evolve certain Pokemon into their more powerful forms. This isn't a difficult process, but does require some steps. It gives a new dimension to the game.
One of the more unique Pokemon in the Pokemon franchise is Porygon, which can be evolved into Porygon2 and then into Porygon-Z. To unlock these evolutions, you'll need to have a few things. These include the Upgrade and Dubious disc. Although these items aren't common however, they're not impossible find in the game.
The Upgrade is a scarce item that is used to unlock the second stage of evolution for Pokemon Porygon in Pokemon GO. To get this item, players must to capture and transfer Porygon. It is best to gather as many Porygons as possible. Each capture and transfer will result in one Candy. Trainers can also try to obtain this item by spinning PokeStops which have a chance of dropping the item along with other rewards.
The Dubious Disc is another rare item in Pokemon GO that can be used to evolve Porygon into a more powerful form. To get this item, players must to collect 50 pieces of Porygon Candy. This can be done by catching Porygons, then transferring them to Professor Willow or walking with your Pokemon as a companion. Trainers can also spin PokeStops to attempt to get this item, but it is a little more difficult.
Evolving a Porygon into its secondary form is a thrilling process that adds a bit of depth to the Pokemon GO experience. It's not difficult however, you'll require some special items as well as money from the game.
Porygon, unlike most Pokemon in the series can only evolve into its final form by using an item known as Upgrade. This item is incredibly rare and can be obtained by spinning PokeStops, or by doing research Breakthroughs. You can also obtain the item when you trade an Porygon with the item attached or when you use the Special Trade item.

This is a rare drop from level 4.
item upgrading is an item used to improve equipment by adding additional attribute bonuses. Upgrades are available in the game's Inventory, from karma sellers, or as rewards for events. They can be added as upgrades to weapons, armors, trinkets and gathering tools. Upgrades can be added to any slot on an item. Certain upgrades require an item with a higher level be added. The majority of upgrade components can be replaced however, it will damage the previous one. Only a few types of upgrades can be salvaged by using top-tier salvage tools, like the Black Lion Salvage Kit or Ascended Salvage Tool.
Items can be upgraded by combining the upgraded item with the item it is placed in, or rerolling it using a reroll token. The rerolled item has 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. Upgrade levels are determined by the item's level, which is determined by its rarity and level. Each tier is broken up into three levels, and each has a different amount of upgrade costs and bonuses.
Generally, upgrading an item will increase its main stat by a fixed amount, and also provide a random extra stat. The cost to upgrade an item is increased as its tier rises however, there are discounts on certain items and the amount of upgrades needed is reduced with each step.
The upgrade item is obtained by spinning Photo discs at PokeStops and Gyms, though it is very unlikely to be dropped every day. It can also be obtained as a reward for a seven-day streak of spinning at minimum one PokeStop or gym Photo Disc per day, and through event-specific Research Tasks.