Hold the "Lock-In" button to finish customizing your Sidekick.
Game Rant on MSN
What Are Sidekicks in Fortnite?
Fortnite players can now purchase and unlock new pals to join their adventures, but what exactly do Sidekicks do?
Fortnite is launching a new cosmetic type, Sidekicks, that have permanent looks. If you want to change it, you have to buy a new one.
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