A Nuzlocke is an informal challenge run of a Pokemon game. The traditional rules dictate that when only the first Pokemon found on a given route may be caught, that Pokemon must be nicknamed, and if it faints in battle it "dies" for the rest of the run. I had never given thought to trying this type of run until a few years ago when Pokemon replays were feelings stale and uninteresting. Nuzlockeing has given me a renewed appreciation for these games - the stakes of battle are higher and the rules give me chances to try new Pokemon a team compositions I would have never thought of. Pokemon like Lanturn have become new favorites!
I will admit, I'm not a perfect Nuzlocker. I usually hack in rare candies to help with grinding, if I encounter the same species of Pokemon I will still catch it, and I made Muncher the ZigZagoon immortal in Pokemon Sword because he is my favorite and I will not allow him to die.
Below is a Hall of Fame for my Nuzlockes! I also included honorable mentions of the fallen soldiers who had great runs. (There were way more dead unfortunately, lol.)

Rest in Peace


Rest in Peace


Rest in Peace


Rest in Peace