The fish and slowking-galar is just the standard set except I added up the spa ev of slowking for some reason that I have forgotten. Anyway these two mons with the ability of regenerator can eat up a lot of damage and are important to the whole team.
Kingambit and Bolt, both with choice items are the core wall breakers of the team. Banded kingambit is really rare and can cause huge damage, ohkoing mons unexpectedly. Its pursuit and knock off can bother special walls from other balance teams and stall teams, making it easier for bolt to eat them up. What’s more, this kingambit is a slow one, slower than Lv 99 wish fish so that it can cause damage to the mon switching in and prevent it from getting healed by the wish fish. This can be pretty useful when facing the annoying fish. Bolt, as another wall breaker, simply gives tons of damage with choice specs. Draco meteor paired with the 1.5 buff provided by the specs can easily let clodsire and ting-lu to lose over half of their hp and ohko some other ground mons like Ursaluna, tusk, lando-t, although Treads and some bulky gliscors can still take that damage. Its evs help it survive earthquake of lando-t after taking the stealth rock damage.
Banded Zama can be a late-game sweeper, dark and steel type checks. Its banded close combat can also 2HKO the nd standard set of that nasty wish fish(like over 90% possibility), iron valiant, diancie-mega, Zama-C with dauntless shield buff and other mons that resist fighting. In addition, it can serve as a game saver when facing set-up oger-W and quiver danced volcarona.
The final mon is the goated bird, the king of the sky. It was not originally in this team, but with the iron press Zama-C coming to the tier, I realized I needed a iron press mon as well to counter Zama-C setting up and sweeping. (btw this mon is crazy. It can finish off my bird with a critical hit, 2HKO galarian slowking and body press my mons left.) Considering the weakness to ground in this team, I finally chose this bird, a reliable physical wall, stopping most physical sweepers and relieving the fish’s stress to eat too much physical attacks. Not to mention Defog, this is only way to end the hazards in this team. But pay attention that the speed of the bird may not be enough to outspeed these 50 base speed mons yet with 252 evs invested on speed, like mega mawile, ursaluna, kingambit.
Some opposing mons that have to be treated with care: gholdengo(sucker punch mind game), heatran with toxic, taunt and magma storm, heatran with grassium Z eating up my fish, blissey with counter, the opposing kingambit that can sweep once zama and the bird are unhealthy, the opposing Raging Bolt, some ursaluna that are faster than the great bird, endure&ghost Z set Ceruledge
To finish, I want to say that all you have to do with this team is just read hard, play safe and enjoy the games.