Articuno @ Never-Melt Ice  
- Blizzard  
- Ice Beam  
- Steel Wing  
- Reflect 

Jolteon @ Mint Berry  
- Curse  
- Growth  
- Rest  
- Thunderbolt  

Marowak (M) @ Thick Club  
IVs: 14 HP / 24 Atk / 26 Def  
- Swords Dance  
- Bonemerang  
- Rock Slide  
- Hidden Power [Flying]  

Articuno beats Marowak, Ursaring, and Grass types. Reflect can be used to halve damage from hard hitting physical attackers such as Ursaring and Heracross. Steel Wing 2HKOs Jynx 80.9% of the time.
Jolteon beats Blissey, Alakazam, Jynx, and Water types. Curse lets Jolteon set up Growth on other Curse users lacking Earthquake.
Marowak covers Articuno's weaknesses very well, beating Machamp, Heracross, and Tyranitar along with Fire, Electric, and Ghost types.