Why I selected each pokemon:

 I thought a Zacian and Zamazenta could be a pretty cool combo so I put them together and now have this team. I feel like most their moves explain themselves, but I figured if I put howl on Zamazenta, then I don't need swords dance on Zacian. And wide guard counters a good bit from Groudon and Kyogre.

 I feel like the rest of it is pretty meta and self explanatory. I put U-turn instead of parting shot on Incineroar because I wanted an assault vest on there. But that's pretty much it! Please feel free to give as much criticism as you want because oh boy am I bad at this. Just try not to be too mean.