Mr. Mime @ Miracle Berry  
- Thunder Wave  
- Encore  
- Psychic  
- Counter  

Machamp @ Leftovers  
- Scary Face  
- Encore  
- Cross Chop  
- Fire Blast  

Raikou @ Leftovers  
- Thunderbolt  
- Crunch  
- Rest  
- Reflect  

Mr. Mime secures wins versus almost every physical attacker with the combo of Counter, Encore, and Psychic.
Machamp beats Electric types like Crunch Raikou and Jolteon that threaten Mr. Mime. It also covers Blissey, Steelix, and Tyranitar.
Raikou beats most opposing Electric and Psychic types with Crunch, and naturally covers bulky waters that threaten Machamp. Rest is used to beat Toxic users and draw out battles so it can fish for Crunch drops.
Reflect plus Magnet Thunderbolt beats most Heracross, but Raikou has a couple other good options. Thunder maxes out damage or Psych Up can be used as an additional Blissey/Jolteon check.