Pros:
OHKO Dewford Meditite
2 Turn Brawly (MS, Strength)
Always Strength x2 Archie Golbat
Mauville -> Petalburg movement (+ movement to/from Brawly's gym): -~1:15

Cons:
+3 Atk Rival 2
Wally WG* 13/16
Mauville Meditite slower/94% 2HKO
Mauville -> Dewford -> Petalburg movement: +1:48