In co-operation with my real-life trait of disliking being fully responsible for a loss, I prefer using the Multi Train when it comes to Battle Subway. Picking members is a problem, as there are several useful Pokemon in starting 6, let alone PC. So I could use some assistance in deciding my best 2:
Bisharp (Buc Nasty), Timid, Razor Claw, Inner Focus
Swagger
X-Scissor
Night Slash
Iron Head
Volcarona (Sea Leaf), Docile, Insect Plate, Flame Body
Heat Wave
Struggle Bug
Bug Buzz
Fly (really regretting that one)
Mienshao (Mientatsu), Impish, Black Belt, Regenerator
Hi Jump Kick
Aura Sphere
U-turn
Rock Slide
Emboar (Piggy), Hardy, Flame Plate, Blaze
Strength
Fire Blast
Heat Crash
Focus Blast
and lastly, Liepard (Fat Cat), Naughty, X Sp. Def, Unburden
Sucker Punch
Night Slash
Assist
Slash
As they are automatically reset to Lv. 50, I didn't think introducing EVs would be necessary. As for roles, well, that depends on who gets picked from the list.