Oscar (Japanese: オスカーOscar) and Andi (Japanese: アンドリューAndrew) are a young couple from Hoenn who are deeply in love with each other. They are characters of the day who appeared in The Bicker the Better. They may have been based on the Young Couple Trainer class, though they are dressed much more formally than the game class.
Oscar and Andi love taking part in Tag Battles with their Nidoking and Nidoqueen. They also claim to have a knack for spotting couples in love. When they spotted Ash and May arguing, they claimed that each had romantic feelings for the other. Ash and May's persistent arguing at the time, combined with this accusation, diminished their concentration, and the enamored couple were able to defeat them without a problem. Similarly, they saw Jessie and James, and claimed that they too were a couple. Even though Team Rocket was able to look past this, they were still defeated.
Nidoking is Oscar's only known Pokémon. He used him in a tag match along with Andi's Nidoqueen against Ash and May with Ash using Corphish and May using Skitty. Due to their bickering that happened for no reason, Nidoking was able to defeat them by using a heart-shaped Hyper Beam with the assistance of Nidoqueen. Later, Oscar used him against Jessie and James and also defeated them as they also had problems with each other.
Nidoqueen is Andi's only known Pokémon. She used her in a tag match along with Oscar's Nidoking against Ash and May with Ash using Corphish and May using Skitty. Due to their bickering that happened for no reason, Nidoqueen was able to defeat them by using a heart-shaped Hyper Beam with the assistance of Nidoking. Later, Andi used her against Jessie and James and also defeated them as they also had problems with each other.
Two of the Coordinators from Staging a Heroes' Welcome! had strong resemblances to Oscar and Andi, the only notable difference being hair color. The Andi lookalike is in the top left corner and the Oscar lookalike is in the bottom right corner.
Coincidentally, Temacu owns a Nidorina and a Nidorino, and a lookalike of her appears in the same episode.