I wanted to try out koko with Hawlucha but didn't like how the hawk got hard stopped by the common Zapdos and it was hard to fit a mon that was viable and could offensively pressure out Zapdos. Mega Swampert came along and made me build this beauty. It's very nice how Hawlucha and Swampert work together breaking walls for each other along with Hawlucha being able to presence annoying mons to rain such as ferrothorn. So, there is also the aspect of ferro and kingdra naturally doing their normal roles on a rain team. Now, another interesting aspect is the koko set.
Zamrock made the very amazing set in mean look koko which I must say I thought was stupid at first but after using it my self I saw how great it is. You need skill to use this set but it certainly is a great stall breaker for rain and is able to remove mons like amoon and mega venu and even tang easily...along with heavily weakening ferro. There is also the second and original option for a koko set in all out attacker which gives you a better match up vs offensive teams basically. So, basically one koko set gives u an auto win vs offense and another helps you remove bulky shit for the other members. The hawlucha is evd to out-speed excadrill out of sand for anyone wondering..I know its not realistic to see excadrill but if u hop on the ladder you just increased your chances. Enjoy!