I just started a Sapphire Nuzlocke today. So far I've got-
Farline lvl 15
Slink lvl 10
Sandra lvl 11
Peggy lvl 10
Lynyrd lvl 9
Paris lvl 12
So far, I've lost two valued Pokemon. Steve the Wurmple who died via a trainer's Geodude, and Prissy the Whismur who was poisoned...