Sprunki grew from the Incredibox community, where fans design original characters with their own normal and horror mode sounds and share them as playable mixes. Boris follows that tradition as an OC, meaning he is not an official character but a creator made addition built for this normal mode loop. Fans swap these clips on soundboards, test how different OCs layer together, and post short mixes where each new character changes the rhythm without needing the full game open.