I'm considering creating a "Survival Challenge" (still working on the title... maybe "Team Slot Elimination Challenge" instead?).
The basic premise would be this:
MANDATORY RULES:
1) You may catch as many Pokemon as you want, wherever you want. However, you cannot catch multiple Pokemon of the same species. Pokemon that have multiple evolution lines (Eevee, Wurmple, etc) or are different based on gender (like Nidoran) are an exception, in which case you are allowed to obtain only 1 of each evolution line.
2) If a Pokemon faints, it is considered dead, and cannot be used again. Even when dead, it still counts towards rule #1.
3) You start with a maximum of 6 Pokemon on your team. Each time one of your Pokemon faints, that number is permanently reduced by 1.
4) You fail the challenge if all of your Pokemon team slots are eliminated. Therefore, if you have your maximum allowed number of Pokemon and you white out, the challenge is ended and you have failed. If you white out with less than your maximum number of allowed Pokemon, you are allowed to continue the challenge with Pokemon from your PC boxes, but you must still eliminate team slots equal to the number of Pokemon that fainted when you whited out.
5) The normal rules do not apply to HM Slaves, but they cannot be used in battle.
Optional Rules:
O1: The use of legendary Pokemon is forbidden.
O2: You must nickname all your Pokemon.
O3: You must replace one team member after obtaining each gym badge. The team member that has been replaced cannot return to the team until after obtaining the next gym badge.
Hard Mode: After obtaining the fourth gym badge, you lose a team slot if none of your Pokemon have fainted yet. After obtaining the eighth gym badge, you lose another team slot unless two or more of them have already been eliminated.
Extremely Hard Mode: After obtaining each even-numbered gym badge, you lose a team slot, unless the loss of said slot would cause you to fail the challenge. This means you have to tackle the Elite Four and Champion with no more than two Pokemon on your team.
Thoughts? Ideas? Discussion? Questions?