This team is built around
Marisa Kirisame, who I don't know much about, but she's a very powerful late game sweeper who is unhinged and will steal your items and kill your dog. She is especially strong against other girls and can disrupt their setup plans and fire powerful Specs Master Sparks to win the game.
The second special attacker is
Dracovish. It makes a good core with Marisa because it's Fire-type attacks are super-effective against Rock, Ground, and Fire types, which Marisa struggles against, and anything else it flinches to death with Dark Pulse. It is the weakest of the Tapu-Legendaries, but it is the perfect fit for this team.
The last special attacker is
Gray Big Box Snake. It's a crime that the Smogoff council hasn't banned this Pokemon, Thunderbolt 8 is too strong of an attack that can instantly KO your opponent's entire team. The 50% accuracy doesn't really matter when this Pokemon has Wonder Guard and a weakness to Ice type, which isn't that bad, and you can use Tera to remove the weakness. This Pokemon has killed four stickmen over and over, and I'm tired of pretending it's shit.
Kirb is my favorite Pokemon to use, since it has priority Speed of Kirb, which is useful to revenge kill Pokemon that would get out of hand. It can also setup a singing axolotl that boosts the power of attacks on your side of the field to insane levels, such as this calc:
512+ SpA Choice Specs Beads of Ruin Dracovish Dark Pulse in Axolotl vs. 0 HP / 252+ SpD Blissey: 21384-25158 (3284.7 - 3864.5%) -- guaranteed πHKO
Obviously the item of choice is Star Rod, which is required to patch up the Dark-type weakness of this team.
Antarctica and
No Way is a strong defensive core. Ice-type for a defensive Pokemon is very good, and for the second largest country in the world, you can keep spamming Glacier to cripple the foe's defense so that your special attackers can break through. However, it has some bad matchup to top threats such as The Sun and Colonialism, but those are countered by No Way. You can Sotp the setup sweepers that would take advantage of Antarctica, while Antarctica can clear hazards for No Way.