Route 3 is a fairly long route and has multiple areas in which you can find Pokémon and trainers. In addition to this, near the Eastern exit of the Route is the Day-Care Centre where you can store two Pokémon to raise and potentially receive an Egg.
Special Moves used in Route 3:Surf
Black & White
Black 2 & White 2
Items - Black & White
Items - Black 2 & White 2