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Mascot Swap: Duolingo x Brawl Stars
Duolingo and Brawl Stars swapped their famously chaotic mascots for a joint in-game event. Duo became a quiz-answering boss in Brawl Stars, while Spike appeared in Duolingo lessons, turning the crossover into a playful two-way challenge with rewards in both apps.
Why it worked: It weaponized a live, two-way mascot feud into timed, playable stakes—quiz damage in-game and streak-gated unlocks—creating event coverage, not ads.
The lesson: Consider hijacking an existing rivalry and shipping a time-boxed, interactive challenge with asymmetric rewards that force cross-platform participation.
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