Lycanroc @ Lycanium Z  
Ability: Steadfast
EVs: 252 Atk / 4 Def / 252 Spe  
Jolly Nature  
- Stone Edge  
- Drill Run  
- Swords Dance  
- Accelerock
Lycanroc is an incredibly threatening setup sweeper in ZU, having the ability to outright rip apart unprepared or weakened teams. It has powerful Rock STAB, Ground type coverage, STAB priority that super-effects Rotom-Frost, and a unique Z move with immense power that can let it blow straight through some walls. However, Lycanroc is not without its downsides, being countered by defensive Ground types and threatened by Grass and Water types as well as just having very low bulk and being weak to Fighting.

Silvally-Grass @ Grass Memory  
Ability: RKS System  
EVs: 252 HP / 80 Def / 148 SpA / 28 Spe  
Bold Nature  
- U-turn  
- Grass Pledge  
- Ice Beam  
- Defog
Silvally-Grass is an excellent partner to Lycanroc, having the capability to seriously threaten common answers to Lycanroc such as Torterra, defensive Poliwrath and Tangela while taking little damage in return. Silvally-Grass also has the ability to pivot into Lycanroc while weakening its switch-ins with U-Turn and preserving Lycanroc's modest bulk. Lycanroc meanwhile threatens the Bug and Fire type Pokemon that may try to take advantage of Silvally-Grass as well as many offensive pivots that otherwise threaten Silvally.
---Teambuilding Weaknesses---
This core can still be worn down,lacks the capability to freely switch against particularly strong attackers, is threatened Choice Scarf users that Lycanroc cannot threaten with unboosted Accelerock, and risks being torn apart by Combusken and Monferno.