User blog comment:CaptainRustbolt21/Agent Dynasty's Contingency Plans/@comment-27873981-20170712025601

For ROCKFLAME's Darkfire and Dark Flameageddon forms: Exposure to a radioisotope of a metal in the Humanimals universe. The radioisotope is called Waviron-210. While water could work, it requires Waviron-210 radiation to affect those 2 forms. All of ROCKFLAME's other forms have darkness as their main weakness.