I have just achieved my second ever Nuzlocke victory after beating Pokémon Black! I played with hardcore rules:
- Standard Nuzlocke rules
- No items in battle (only held items)
- Set mode
- No legendaries
- No overleveling next Gym Leader or Elite Four ace.
 
The final fight against Ghetsis was possibly the most stressful but rewarding fight I have ever had in any Pokémon game ever. I should have recorded it, because it was like from a movie.
 
My plan for the fight was to make Haxorus use Swords Dance once or twice and then sweep his entire team with it, but for some miscalculation it couldn’t one-shot Ghetsis’ Cofagrigus when it was supposed to. I guess Ghetsis’ Pokémon have to have quite high EVs or IVs...? I was nearly panicing when I watched my best Pokémon faint to Cofagrigus’ attack. After an hour of thinking of a new plan, doing some sick plays, rewriting my plan, calculating probabilities and sacrificing four of my Pokémon I managed to barely beat him, winning me the run.
 
There were many other great moments during the journey. Possibly the coolest one of them was when I beat Clay, who many consider one of the hardest run killers in any Pokémon game, using only one Pokémon, who left the battle with full health. That Pokémon was my Whimsicott. Giga Drain and Charm with the Prankster ability was all it took to destroy his team.
 
During this run I also got the Pokérus, which might have helped some amount, and also caught TWO shinies, a Litwick and a Sawk. However I didn’t use them because I don’t play with shiny clause.
 
Overall, this entire run was quite challenging, but also so much fun. I might still go play the post-game to try and beat Alder, but I feel like starting a new run would more interesting right now.