Tailwind Support (Illumise) (F) @ Covert Cloak  
Ability: Prankster  
Level: 50  
Tera Type: Bug  
EVs: 244 HP / 236 Def / 4 SpA / 20 SpD / 4 Spe  
Bold Nature  
IVs: 0 Atk  
- Tailwind  
- Struggle Bug  
- Encore  
- Helping Hand

As one of only 2 Pokemon with priority Tailwind, Illumise has a unique niche in VGC 20XX. Struggle Bug gives it something to do if Taunted, and is a nice debuffing tool in general. Encore can lock opponents into undesirable moves. Helping Hand powers up a teammate. 

Pairs well with: Intestinorm, Mudaimer, Kagunawa, Ulmiraj