The Strength of Steel event is available in Pokémon Go, alongside three Collection Challenges that you have the chance to complete. One of them is called Chrome Catch and features a handful of Steel-type Pokémon you can encounter during the event.
These Pokémon appear briefly, giving you an increased chance to encounter them in your local area. You must act fast to complete the Chrome Catch Collection Challenge to earn all the rewards. The challenge won’t stick around for long, and some of the Pokémon in this collection are tougher to encounter in the wild than others in Pokémon Go.
