Sword in the stone: TV Series

The plot would be the search for the legendary Excalibur as the animated film only showed the first part of King Arthur's fairy tale in which he is chosen the king after going through the challenge of the sword in the stone. The rest of the storyline would involve the need to get a better weapon, and to achieve this, Merlin turns the squirrel (from that scene of the movie's squirrels) into an anthropomorphized character (Arthur's size, clothes, speech, etc.), because she knows the forest better than them.