Near the end of the episode, Arino fights Ganon for the first time and gets defeated because he doesn't know he needs to use the Silver Arrows to finish Ganon off. The footage then cuts to a quick montage of Arino visiting the Faerie Fountain where the Golden Sword and Silver Arrows are obtained, then goes back for a rematch which he eventually wins.
However, during the first match, when Arino switches to the menu screen to select the Lantern, it can be seen that he already had the Golden Sword and Silver Arrows all along. Presumably Arino did find the Faerie Fountain before the first match, and they edited the order of the footage and feigned the lack of Silver Arrows on the first battle purely for dramatic effect.