Rex Raptor and Weevil Underwood's National Championship Duel

Rex and Weevil's regional Duel was the final Duel of the the Japanese regional Duel Monsters tournament in the Yu-Gi-Oh! manga and second series anime. The finalists were Weevil Underwood from East Japan and Rex Raptor from West Japan, aged 14 and 15 respectively at the time. One of them defeated Mako Tsunami in the semi-finals.

The Duel took place in a Battle Box and was televised.

The Duel used an early set of Duel Monsters rules which vary greatly from the Yu-Gi-Oh! Official and Trading Card Games.

The Duel
The first few turns aren't shown.

Rex Summoned "Two-Headed King Rex" (ATK: 1600) and Weevil countered with "Basic Insect" (ATK: 500).
 * Rex's turn

"Two-Headed King Rex" attacked "Basic Insect", but Weevil activated "Infinite Dismissal", negating the attack.

Weevil equipped "Basic Insect" with "Level 5 Laser Cannon" (ATK: 500 → 2000).
 * Weevil's turn

"Basic Insect" attacked and destroyed "Two-Headed King Rex" (Rex: 0 Life Points), winning the Duel for Weevil.

Aftermath
Maximillion Pegasus presented Weevil was the trophy for winning the tournament and invited him to take part in his Duelist Kingdom tournament.