Pokémon Go ‘Test Your Mettle’ event guide
Pokémon Go’s “Test Your Mettle” event adds Mega Aggron and Togedemaru and increases the spawns of steel-type Pokémon. Our guide lists Timed Research and perks.
This article references relevant content from the polygon.com website. Original article link: [https://www.polygon.com/pokemon-go-guide/23356506/test-your-mettle-mega-aggron-lairon-beldum-steel-type-togedemaru]

Pokémon Go’s “Test Your Mettle” event has a steel-type theme and introduces Togedemaru and Mega Aggron to the game. The event runs from Sept. 16-21 and features a handful of special bonuses.
Notably, you’ll get more candy for catching Pokémon with nice, great, or excellent throws. Completing the event Timed Research Tasks will also reward the new Togedemaru and a ton of Aron Candy so you can power up an Aggron to Mega Evolve.
We list out all the bonuses and perks of the “Test Your Mettle” event below.
Test Your Mettle Timed Research Tasks and rewards
Rewards: Togedemaru encounter, 1 Magnetic Lure Module, 2,500 XP
Rewards: 25 Aggron Mega Energy, Aron encounter, 50 Aron Candy