Zarel/Pokemon-Showdown — pull request #507 by InvalidDN (2013-12-16 08:01:18+00:00)
Title: Fix Powder for Hidden Power and Weather Ball

This makes Powder's effect work on Hidden Power when it's fire type and Weather Ball when it's fire type. Without this, it doesn't affect the moves. I've tested both moves in-game and Powder does behave this way.