Blue obtained Golduck as a Psyduck and evolved him sometime prior to A Tale of Ninetales. He first appeared in A Tale of Ninetales, when Golduck was accidentally traded to Red alongside Blue's other Pokémon. During the three days that Red had them, he attempted to get them to relax and open up to him, with little success. They later traded back, while keeping the caring attitude that Red instilled in them.
In Peace of Mime, Golduck teamed up with Pika in order to break into Saffron City. Pika uses his Substitute to get past the barrier and Golduck used Confusion to pass the information back to their Trainers. Inside the city, Pika ran into the one who created the barrier, a Mr. Mime. Despite Mr. Mime's evasive attempts, a coordinated Thunderbolt from Pika successfully defeats the Barrier Pokémon, lifting the barrier.
In Weezing Winks Out, Golduck fought against Agatha, using his Confusion attack to defeat her and her Arbok. In Striking Golduck, Golduck was called out to fight Agatha's Gengar but was quickly defeated after his opponent launched an attack from the shadows.
In The Final Battle VII, Golduck appeared alongside the rest of Blue's team when he was checking to make sure they all survived the petrification caused by Mewtwo and Darkrai.
Personality and characteristics
Like most of Blue's Pokémon, Golduck is serious, calm, and focused. He is very loyal to his Trainer and gives everything he has in battle. However, he is usually used as support in battle to help his team gain the advantage, and he rarely takes a huge offensive approach. He is often used by Blue for his Psychic powers, which are utilized by the Pokédex.