Three teams of three kids compete in a series of weird, outrageous, and unusual events; all played against nine pre-videotaped on-the-street contestants.
Rounds 1 & 2
In the first two rounds, one player from each team chose a video on-the-street player from the wall (hence the name of the show) to play against in a stunt. A brief videotaped interview was then played, after which host Larry explained the stunt. The stunt began by virtue of Larry & the audience counting down (5... 4... 3... 2... 1... GO!), and the in-studio player's job was to beat the videotaped on-the-street player (sometimes within a time limit). If successful, the contestant earned points for the team, but if unsuccessful, no points were awarded (ties always went to the on-the-street player). After one player took a turn, another player from the opposing team took a chance. One of the on-the-street players was dubbed the "Double Trouble" player; should the in-studio contestant win this stunt, he/she earned double the points for the team.
Round 3 (Head-to-Head Challenge)
The final two players from both teams compete against each other & one last video player in this deciding round called "The Head-to-Head Challenge". To start, the video challenger's interview was played, then the challenge was explained & played. The first studio contestant to beat the video challenger earns 300 points, with an additional 250 points awarded for beating the studio opponent. (In the event of a tie between studio players, no points are awarded.)
The theoretical maximum score was 1,050 points (100 in round 1, 400 in round 2 [via "Double Trouble"], and 550 in round 3).
The team with the most points wins the game, and goes on to play for a grand prize.
The Ultimate Showdown (Bonus Round)
In the bonus game, the winning team plays one last game, this time against a member of the studio audience. After the game was explained, the round began. If the winning team can beat the audience member, they win a grand prize for each team member. But if not, the winning team still takes home a consolation prize.