According to other posts in the 2000 discussion forum, mescaline is oral active in 350-500mg dosages, which means the pill would have to be pretty big or utterly lacking in MDMA and inert binders (i.e. no roll and the pill won't hold its shape).
BTW, 2-CB is 4-bromo-2, 5-dimethoxyphenethylamine, not a mixture of MDMA and mescaline. And the most likely explanation of a "candyflip pill" is that it was MDA, which is longer in duration and trippier than MDMA.
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Entropy requires no maintenance. -- Robert Anton Wilson