The main idea is that with the ban on Drizzle, I was super depressed because I love the rain. Specifically, my main DPP OU team features a Uxie that sets up rain dance so Kingdra and Qwilfish can nuke the opposing team.
The role of Uxie has been replaced by Volbeat, who was originally an Illumise because I was under the assumption Volbeat and Illumise were the same in terms of stats and we all know Illumise>>>>>>>Volbeat aesthetic-wise. However, as it turns out, Volbeat has a higher attack than Illumise. This doesn't make much of a difference, other than that his U-Turn hits a little harder. Volbeat is bulky enough to take a hit and has Prankster, which, unless a Dark Type is in the lead (Which is not very likely because the Dark types in OU are typically not leads), gives Volbeat priority to set up Rain Dance. Then, he has a slow U-Turn which typically comes at the end of the turn, which allows him to take the hit while swapping into someone like Kingdra or Raikou.
(Huge thanks to
Eve on the Discord server who has been playing bdsp and helped me through Jirachi's identity issues) Jirachi's big role here is setting up Stealth rocks and other utility tasks like T-wave and swapping out with U-turn. It was a bit tricky for me to understand that with the loss of iron head, Jirachi is no longer an "abuse Serene Grace" mon and more utility. Ironically, I predicted Jirachi would become a stealth rock setter after I found out he lost Iron Head lmao. Jirachi's going to set up stealth rocks and maybe eliminate potential speed control with t-wave. Since this team appreciates the stealth rocks damage and the halved speed from paralysis, Jirachi is a great utility mon on this team who can help generate momentum.
Raikou is a standard special attacker, but what is unique is that almost all of his attacks particularly take advantage of the rain. Thunder has 100% accuracy in the rain and Scald gets boosted power. If Raikou needs to switch, he has a quicker Volt Switch that lets him pivot into something else.
Kingdra should only be taken out in the rain. With doubled speed from swift swim, he doesn't need much speed investment like a choice scarf. Therefore, he's slower and not as effective when it's not raining. But when it is, Kingdra will almost always go first and nukes the battlefield. He has access to Draco Meteor and Hydro Pump, which are two high power STAB moves. Surf has more power than Scald, and Dragon Pulse is also a good pick.
Scizor is, and has been, pretty much another Lando-T, as in it is essentially the competitive Pokemon equivalent of a wild card. Pretty much anything you want it to do, it can do, and provides great role compression. In this case, Scizor is Volbeat's partner in refreshing the rain and having pretty good bulk. The health refresh from Roost doesn't necessarily give him the world's best defensive utility, but it does help in terms of getting some health back and keep the momentum going.
And, finally, Garchomp is a standard Garchomp. What mostly changed with him is a few EVs were shuffled around and Surf was removed. Garchomp
can go special, but the way my Garchomp has been constructed with natures and whatnot, Surf has the power of a dollar store squirt gun, even in rain. So, instead, I gave Garchomp Stone Edge and made him more specialized in the physical field. This team needed a good physical guy to avoid being completely walled by Blissey.
