I like Frisk, Technician, Klutz, and Own Tempo, Tangled Feet for Longlegs. I'm not sure whether it would be better to not be confused at all, or get a stat boost from confusion and risk passing it onto something that could beat itself up. The speed boost probably wins out.
White Smoke, Shield Dust, Cute Charm, Poison Point, and Effect Spore for Smog Imp. Effect Spore and Shield Dust for the nasty particles and bits of sand in the cloud.
White Smoke, Shield Dust, Cute Charm, Poison Point, and Effect Spore for Smog Imp. Effect Spore and Shield Dust for the nasty particles and bits of sand in the cloud.