A Nuzlocke is a self-imposed challenge run for Pokemon games. The core rules: any Pokemon that faints is dead, and you can only catch the first Pokemon on each route.
Nuzlify supports Pokemon Red, Blue, Yellow, Gold, Silver, Crystal, Ruby, Sapphire, Emerald, FireRed, LeafGreen, Diamond, Pearl, Platinum, HeartGold, SoulSilver, Black, White, Black 2, White 2, X, Y, Omega Ruby, Alpha Sapphire, Sun, Moon, Ultra Sun, Ultra Moon, and Pokemon Unbound.
Drop in your .sav/.dsv file on the dashboard. Nuzlify reads your team, badges, and progress automatically.
No, but creating an account lets you save progress and access runs from multiple devices.