I'd say the word "genius" in this context is getting used being an adjective, which It's not at all - the adjective type is "ingenious". "Boy genius" is idiomatically preferable, as indicated elsewhere. Observe: To be sure you get no advertisements, please Make sure you log in to your account. https://collintftix.blogchaat.com/36629161/where-to-find-secret-crows-in-the-genius-crow-secrets