Mew @ Light Clay  
Ability: Synchronize  
Tera Type: Psychic  
EVs: 252 HP / 252 Def  
Calm Nature  
IVs: 0 Atk  
- Struggle Bug  
- Life Dew  
- Electric Terrain  
- Light Screen

Mew @ Silver Powder  
Ability: Synchronize  
Tera Type: Bug  
EVs: 252 HP / 252 Atk  
Adamant Nature  
- Struggle Bug  
- Swords Dance  
- Leech Life  
- Mud-Slap

Mewtwo raid

You want one support Mew and three "DPS" Mew, but okay it by ear - not every DPS needs to be DPSing. Priority number one is keeping Mewtwo's spatk in the gutter. Spam Struggle Bug for several turns before doing anything else. Then, one or two of you start setting up for offense while the third keeps Struggle Bugging. Mewtwo CMs constantly so you need to be counteracting it. When it's offence time, SD up, tera bug, and spam leech life. Even if your buffs get cleansed, because Mewtwo never clears buffs and debuffs at the same time, it's safe to SD back up. If it cleanses its spatk drops, immediately go back to all spamming Struggle Bug. Just have a designated "lead dps" who'll be the first to attack, and use your common sense to work out if you're best off attacking or supporting. As for the support Mew, Light Screen straight away and refresh as soon as needed. Life Dew as needed, and make sure terrain is up when the shield breaks.

Columns Mode / Stat Colours / Light Mode