po-devs/pokemon-online — pull request #1232 by Fuzzysqurl (2014-10-15 16:56:59+00:00)
Title: Fix OHKO immunity in RBY

OHKO should be affected by type immunity in Gen 1. The ```power > 1```
check is for Counter/Mirror Coat and Fixed damage (Seismic Toss, etc.)
since those ignore immunities.