It's Frosty the Snowman, Charlie Brown is a fanmade special.
Frosty's hat is floating in the air and it acciently bumped Woodstock. Which causes him to be trapped in the hat and bumped into the tree (light Charlie Brown did in the beginning of A Charlie Brown Christmas). Woodstock is still stuck in the hat and bumped Snoopy while he is holding Linus' blanket and the kids (Peanuts gang), including Charlie Brown crashes each other off the ice. Charlie Brown look in the hat, got Woodstock out of the hat first, and see no name in the hat. Sally, Lucy, Linus, and the others suggested to make a big snowman in history. After that, Charlie Brown placed the hat on the head, and Frosty came to life. The gang are stocked by what they see and Frosty introduce himself. The gang has questions and played with him. The bullies (from Race for Your Life, Charlie Brown and He's a Bully, Charlie Brown) like to get revenge on the gang by snacthing Frosty's hat. They throwed tons of snowballs at them and one snowball hits Frosty's hat. The bullies' cat took it and Snoopy tried to fight him, but failed. The bullies destroyed the remaining body of Frosty. The bunny (from Frosty the Snowman) and the kids (from Frosty the Snowman, Frosty Return, Frosty's Winter Wonderland, and The Legend of Frosty the Snowman) heard that a magical snowman (Frosty) is here. They heard that the bullies had taken the hat and so the gang, kids, and the bunny faces the bullies to get the hat back. But, the bullies throwed the hat like a frisbee to them, and they noticed that the hat had been torn up. Which means, no more Frosty. They all cry and their tears is wetting the hat. But the hat is glowing and all the snow under it was winding up to a structure shape of Frosty. The hat landed on the head and Frosty came back to life. He noticed all of his old friends and all the kids, including the bunny, Snoopy, and Woodstock, sang "Frosty the Snowman". Before all the kids went home, they like to say goodbye to Frosty. Right before they left, Frosty's wife and kids showed up and told Frosty that his hat was blown away by the big storm at the North Pole. The kids went home and so does Frosty and his family.