Regigigas @Leftovers
Ability: Slow Start
Tera: Poison
EVs: HP: 252 / Atk: 252 / Sp.Def: 4
Adamant Nature
-Body Slam
-Knock Off
-Sleep Talk
-Rest
In testing, I found that Regigigas is better than I think people are giving it credit for, as while Slow Start is a very big annoyance, Regigigas still has very impressive bulk, especially by ZU standards. My idea is that for most of the game, Regigigas can function as a sponge for the rest of the team, and fish for paralyzes with Body Slam or remove items with Knock Off, and with Rest and Sleep Ralk Regigigas can heal back up to full and continue to be annoying. The opponent also must respect it, because if Regigigas gets over it's Slow Start, that's basically GG on the spot because on top of it's amazing bulk, it still has that massive base 160 Attack. Tera Poison is chosen because it gives Regigigas a Fighting resist, and Poison is just an overall solid defensive type.
Mespirt @Leftovers
Ability: Levitate
Tera: Steel
EVs: HP: 252 / Def: 4 / Sp.Def: 252
Sassy Nature
-Stealth Rock
-Psychic Noise
-U-Turn
-Knock Off
When thinking of pokemon that could synergies with Regigigas, the top pokemon of ZU, Mespirt, instantly came to mind for me. As a Psychic type, it can threaten Fighting types that Regigigas doesn't like, and Regigigas can switch into Ghost moves that Mespirt doesn't want to deal with. Went with standard Sp.Def set, because the rest of the team you'll see later aren't the best with Special attackers.
Charizard @Heavy-Duty Boots
Ability: Blaze
Tera: Ground
EVs: Sp.Atk: 252 / Sp.Def: 4 / Spe: 252
IVs: 0 Atk
Timid Nature
-Hurricane
-Flamethrower
-Scorching Sands
-Will-o-Wisp
I figured I should add something that can handle Fighting types better offensively, so I added Charizard for this reason. On top of being able to threaten Fighting types with Hurricane, Charizard can also just burn them for the benefit of Regigigas, or burn Physical Dark types for the benefit of Mespirt. This set is just standard Offensive Charizard.
Sandslash @Heavy-Duty Boots
Ability: Sand Rush
Tera: Ghost
EVs: HP: 128 / Atk: 252 / Spe: 128
Adamant Nature
-Rapid Spin
-Earthquake
-Knock Off
-Spikes
With the fact that Regigigas forces pokemon to switch alot to get something in that threatens it, I figured adding Spikes would really benefit this team, and I don't yet have removal for hazards, so I added Sandslash. Sandslash adding Spikes, as mentioned before, makes switching around pokemon way harder, and it removing hazards makes sure Regigigas doesn't have it's Bulk cut into, and greatly benefits Charizard if it loses it's Boots. I decided to give Sandslash it's utility set with more of an offensive EV spread.
Spiritomb @Leftovers
Ability: Pressure
Tera: Poison
EVs: HP: 252 / Def: 252 / Sp.Def: 4
Bold Nature
-Foul Play
-Will-o-Wisp
-Pain Split
-Hex
With Dual Hazards, I wanted a Ghost type to block attempts to spin them away. Spiritomb seemed like the best one in the tier, so I went with it. Spiritomb also has Will-o-Wisp, which benefits Regigigas and Mespirt for the same reasons Charizard benefits them. Set is the Defensive version, making sure Spiritomb sticks around longer to block Spin.
Jolteon @Choice Specs
Ability: Volt Absorb
Tera: Fairy
EVs: Sp.Atk: 252 / Sp.Def: 4 / Spe: 252
Timid Nature
-Thunderbolt
-Volt Switch
-Alluring Voice
-Shadow Ball
With the other 5 members, I felt I was lacking in something that could close out the game, and looking through what was available, Specs Jolteon seemed to be what I was looking for. At the end game when the opponent has been weakened, I can send out Jolteon to finish off what they have left. Jolteon also can take out lots of pokemon that threatens most of my team, with Alluring Voice it threatens Fighting types for Gigas, with Shadow Ball it threatens Ghost types for Mespirt, and with Bolt and Switch it threats Water Types for Zard and Slash.
Pokepaste: https://pokepast.es/fef382126a00d5cd
