Jolly Breloom sucks? How can you say something so horrible? D:
The most speed Toxicroak invest these days are 252 EVs in speed without a +Spd nature with means Jolly Mamo outspeeds.
You can use Stone Edge against Gyarados, while it might not be the most viable option it is something mamo can use.
Also, yea I screwed up with Kyurem, I thought the common EV spread aimed to outspeed Lucario but it aimed to outspeed Jolly Mamo, my bad.