I was gone for most of last weekend; spending the night at my grandmother's house (also my previous home) so I could spend time with my girlfriend who lives back in Grand Rapids.

During so, I had a lot of free time, and I brought my Pokemon Heartgold. I started a new game with intention to tackle a Nuzlocke playthrough. But I quickly decided to go by my own rules instead:

Rule 1: You may only train 3 Pokemon at once (with the exception of early in gameplay when you're unsure what 3 Pokemon you're choosing).
Rule 2: You may use the remaining 3 slots for HM mules, but you may NOT send these pokemon into battle.
Rule 3: No using Revives. Attempt to keep Pokemon from fainting.
Rule 4: If all 3 of your Pokemon faint, reset your console.
Rule 5: No trading Pokemon.
Rule 6: No breeding or selective tactics.

Bonus Rule 1: Try to go for Pokemon that are outside of your comfort zone and dream team.
Bonus Rule 2: Name you, your rival, and HM mules using the incomprehensible symbols and emoticons offered.

...though, honestly, the only challenge is having to overcome the few elemental disadvantages you'll have to face. Training only 3 Pokemon does give you the advantage of those 3 Pokemon leveling up much faster than 6 Pokemon. Heck, I ended up having no problem beating Whitney.

My 3 Pokemon are Feraligatr, Amphiros, and Crobat (I never thought I'd ever actively train a Zu/Gol/Crobat beyond the purpose of filling my pokedex).