Ash-tachi want to cross a terrific, huge bridge, but find it's not open to pedestrians, only to cyclists. They get their chance when Joy asks them to deliver Pokémon medicine for a sick Shellder on the other side. With borrowed bikes, they ride and have fun until they are stopped by bikies (except they're on pedal bikes, not motorbikes, heheh) who taunt them and then challenge them to Pokémon battles. Ash's Charmander beats Chopper (the lead male)'s Golem, and Misty's Psyduck embarasses itself in front of Tyra (the lead female)'s Cloyster.
Then Team Rocket appear... this was their old territory. They used to belong to the Bridge Bike Gang, when they were known as Big Jess and Little Jim. They employ the gang's help to beat Ash and his friends, but they are scared off by an Officer Jenny. A rainstorm starts up, but Ash is getting worried about the Shellder and rides strongly through the rain. Meanwhile, the gang encourages Jessie and James to go and challenge them, showing them how to really ride.
It ends up being Ash-tachi who triumph, and when the gang learns that Ash was just trying to help a sick Pokémon, they escort the group to the Pokémon Center. Now, Team Ash has their respect instead of Team Rocket.