Mega Qwilfish would be pretty cool if it kept Intimidate since its current competitive viability is based on the combination of Intimidate + Thunder Wave + Spikes/Toxic Spikes but its current stats are rather lackluster so it'd greatly benefit from a potential Mega's stat boosts. that said though, even with Mega boosts it's not exactly the sort of Pokémon you'd want to use your Mega slot on (cont)