Except it doesn't OHKO Hydreigon. It 2HKOes and dies to Fire Blast, unless it misses. I can confirm this through my personal experience while testing it.This may be too small of a detail to mention for Accelgor, but he is one of the few Pokémon that can reliably outspeed and OHKO Ghestis’ Hydreigon with STAB Bug Buzz. The speed tiers of most Pokémon aren’t good enough to outspeed an overleveled Hydreigon, and Hydreigon’s absurd power and coverage makes it hard to take a hit and swing back. Accelgor makes dealing with him much easier.