Dugtrio @ Groundium Z  
Ability: Arena Trap  
EVs: 252 Atk / 4 SpD / 252 Spe  
Adamant / Jolly Nature  
- Precipice Blades  
- Stone Edge  
- Substitute  
- Memento
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Optional Move(s):
- Toxic
- Earthquake
- Sucker Punch
Optional Item(s):
- Focus Sash
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Overview:
Dugtrio's high speed and Arena Trap lets it trapped pokemon like offensive Primal Groudon, Necrozma-Dusk-Mane and Magearna. Its access to Memento lets it support its teammate by giving some set-up opportunities. However, Dugtrio has middling Attack stat , which leaves it reliant on residual damage and Z-move to score KOs, with the latter limiting its team to used one as some such as Lunala, Zekrom and Necrozma-Dusk-Mane are better users than Dugtrio. In addition, Dugtrio brings in some dangerous pokemon that didn't take too much damage from its attacks such as Mega Salamence and Zygarde-Complete after it traps something. Precipice Blade's 85% accuracy can be detrimental as a STAB because a single miss would result of losing Dugtrio, failing to do its job. Its lacklustre bulk makes it unable to switch into anything, even on some passive pokemon such as Transform Chansey are quite risky to switch into.