User blog comment:Kogath/Monster Hunter Generations Discussion/@comment-26995086-20160905134016/@comment-5569775-20160905150359

Bombay Boost and Felyne Pyro both increases the motion value of all Bombing moves by 20%. Bombing cat's naturally do the same. All 3 of those stack for a 1.6 multiplier to the motion of Bombing moves.

Morph Ball Bomb changes explosive rolls motion from being that of a Mini Barrel Bombay to a Barrel Bombay. Landmaster will also probably increase the damage in a similar way, but I've yet to test it.

I should also point out(do to some confusion amongst others elsewhere) that the motion of the bombing skills is dealt as fixed damage, so it's still unaffected by the weakness of a monster. It simply scales in accordance with your Attack. Though I do need to test to see if it's based on your melee only(what I tested with) or if it'll use your range attack value, if it's higher.

GaijinHunter has a video on YouTube covering the Support moves and their Motions.

As for your cat, Rath-of-Meow could be fun occasionally with some monsters, but as far as effectiveness goes, it's not that great. Comparing cost to damage, Explosive Roll with Morph Ball Bomb does more damage. If you want to have fun with explosions while doing good damage, it's better to have a Bombing or Protection Cat(increases the motion by 10%), though you may need something to speed up their gauge build up(Counter Boost and Anger Prone(since you build up gauge quicker when angry) are my best recommendations.

Also, Fighter cats have a .9 multiplier to the motion of bombing moves, probably to make up for the 20 higher raw they'd have at level 50.