Gumshoos @ Life Orb  
Ability: Strong Jaw  
Tera Type: Normal  
EVs: 248 HP / 252 Atk / 8 Def  
Brave Nature  
IVs: 0 Spe  
- Hyper Fang  
- Thunder Fang  
- Ice Fang  
- Pursuit / Fire Fang

Porygon2 @ Eviolite  
Ability: Trace  
Tera Type: Ghost  
EVs: 252 HP / 252 Def / 4 SpD  
Relaxed Nature  
IVs: 0 Atk / 0 Spe  
- Trick Room  
- Foul Play  
- Recover  
- Teleport

Cresselia @ Leftovers  
Ability: Levitate  
Tera Type: Fairy  
EVs: 252 HP / 4 Def / 252 SpD  
Sassy Nature  
IVs: 0 Atk / 0 Spe  
- Trick Room  
- Moonblast  
- Lunar Dance  
- Moonlight

Marowak-Alola @ Thick Club  
Ability: Rock Head  
Tera Type: Ghost  
EVs: 252 HP / 252 Atk / 4 Def  
Brave Nature  
IVs: 0 Spe  
- Flare Blitz  
- Poltergeist  
- Earthquake  
- Shadow Bone

Mawile-Mega @ Mawilite  
Ability: Intimidate  
Tera Type: Steel  
EVs: 252 HP / 252 Atk / 4 Def  
Brave Nature  
IVs: 0 Spe  
- Swords Dance  
- Play Rough  
- Knock Off  
- Sucker Punch

Hatterene @ Life Orb  
Ability: Magic Bounce  
Tera Type: Fire  
EVs: 252 HP / 4 Def / 252 SpA  
Quiet Nature  
IVs: 0 Atk / 0 Spe  
- Trick Room  
- Dazzling Gleam  
- Psyshock  
- Mystical Fire

Gumshoos TR Bulky Offense

I think that a Trick Room team would be what makes the most of Gumshoos' potential. His Hyper Fang STAB with Strong Jaw was surprisingly strong when I tried it, so I guess it's not so bad after all. The team has been built as a Bulky Offense, so I think it should be played as such. Porygon2 is full DEF with Foul Play to win duels with most of physical attackers of the metagame, and Teleport to keep the momentum with a free switch out after setting Trick Room. SpDef Cresselia goes very well with Def Porygon2 as a defensive core, and is a second Trick Room setter. Moonlight is not mandatory on it since it has Lunar Dance, but can be useful if you really want Cresselia and Porygon2 to work as a defensive core. Also keep in mind that Lunar Dance doesn't proc when you're sending a full HP full PP unstatused pokémon after using it ; keep that in mind to lure your opponents ! Besides that, the rest of the team is very straightforward, Marowak-A and Mawile-M work greatly together as wallbreakers, and Hatterene is a third Trick Room setter on top of being a good damage dealer. Merry Christmas !

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