Mimikyu @ Ghostium Z
Ability: Disguise
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Shadow Claw
- Shadow Sneak
- Play Rough
- Swords Dance

Marshadow @ Life Orb
Ability: Technician
EVs: 252 Atk / 4 Def / 252 Spe
Jolly Nature
- Shadow Sneak
- Spectral Thief
- Hidden Power [Ice]
- Close Combat

Gengar @ Choice Specs
Ability: Cursed Body
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 0 Atk
- Shadow Ball
- Sludge Wave
- Thunderbolt
- Trick

Lopunny-Mega @ Lopunnite
Ability: Limber
Happiness: 0
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Frustration
- High Jump Kick
- Fake Out
- Ice Punch

Smeargle @ Focus Sash
Ability: Own Tempo
EVs: 252 HP / 4 SpD / 252 Spe
Timid Nature
IVs: 0 Atk
- Spore
- Sticky Web
- Stealth Rock
- Whirlwind

Magearna @ Leftovers
Ability: Soul-Heart
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 0 Atk
- Thunderbolt
- Ice Beam
- Shift Gear
- Calm Mind

If an opponent has a taunt lead, don't lead smeargle, since it doesn't have magic coat. This is because I would rather prevent setup than cause a 50/50 for getting up hazards. Instead, when the opponent has a taunt lead, lead M-Lopunny. Smeargle can come in later on a tangrowth or defensive lando. But it is important to note that this team doesn't rely on webs, so it isn't a huge deal. The webs make these two pokes easier to handle: magearna and marshadow. If you don't have webs up and the opponent brings in shift gear magearna, the answer is to switch directly into Marshadow, as it will eat any non-fairy hit and steal the shift gear boosts. Mimikyu's z-move will always kill opposing marshadow, even before a boost, so save the disguise if you lose webs. If webs are up, however, neither of these will be as much of an issue. Have fun!