What was your build for accelgor since now that I have a Luxury HA shelmet, I'll breed my own. Lol.
Timid, 252 spe, 252 sp at., 4 sp def.
Bug Buzz
Giga Drain
Me First
Spikes
Spikes can be changed for things like Sludge bomb, Yawn, Guard Swap, Focus blast...
Me first requires prediction, but if you do it right things like Draco Meteoring a Noivern can (and will) happen.
Finally be careful, Accelgor has some useful pre-evo only moves so only evolve it when you are completely sure.