I noticed that in the Wild Pokemon List doc, the Relic Castle upper floors % numbers are off. First of all, "Sand, Normal, 1F" adds to 90% and not 100%, and the "Sand, Normal, B1F" adds up to 94%.
Thing is, in around 300 encounters I've never encountered a Larvesta in B1F, is it really there in the encounter table? Especially at the supposed 4% rate, I think there's something off about that.
edit: At around 400 encounters I found one, finally. At least I know it's in the table, but the values are certainly off.