If you play a female character, you might be pinning your hopes on the Raczilla (T-shirt) Maximum Stats item available in the pro shop for $5,000,000. It is also pink, and even has a picture of the Raczilla character (the guy in the bunny suit you played during the Tiger Challenge). Unfortunately, I tried it with my female character and hit -12 exactly on the Westchester course. No dice... no achievement fired.