Number Ninety-Three, Diagon Alley

• Type: Shop (Joke Shop)
• Location: Diagon Alley, London, England
• Owner/Residents: Fred Weasley and George Weasley
• Key Features: A garishly colourful orange and purple storefront that stands in bright contrast to its surroundings. It features a large, animated figure of a Weasley twin tipping his hat. The interior is magically chaotic, crowded, and packed with merchandise.

Number Ninety-Three, Diagon Alley is the physical premises of Weasleys' Wizard Wheezes, a highly successful joke and novelty product business founded by Fred Weasley and George Weasley. The enterprise began as an owl-order service operated by the twins during their final year at Hogwarts. The start-up capital of one thousand Galleons was provided by Harry Potter, who gave them his prize money from the Triwizard Tournament. The shop was officially opened in the summer of 1996. Its appearance was designed to be a showstopper; the windows were so dazzling that they cast a golden glow over the street. The left-hand window was filled with a variety of bouncing, shrieking, and chattering novelty items. The right-hand window was dominated by a massive poster featuring the twins, advertising their popular WonderWitch line with the slogan: “Why are you worrying about You-Know-Who? You SHOULD be worrying about U-NO-POO — the constipation sensation that’s gripping the nation!” The interior of the shop was just as vibrant and chaotic as its exterior. It was consistently packed with customers, with shelves stacked to the ceiling with products. The atmosphere was one of high energy and fun, providing a much-needed morale boost to the Wizarding World during the early days of the Second Wizarding War, a time when many other Diagon Alley shops were boarded up or had become gloomy. A young witch named Verity was one of their first known employees.

The shop serves as a symbol of the Weasley twins' ambition, talent, and rebellious spirit. It first appears in Harry Potter and the Half-Blood Prince when Harry Potter, Ron Weasley, and Hermione Granger visit during their school shopping trip. The shop's overwhelming success is a source of immense pride for Arthur Weasley and, eventually, Molly Weasley. During their visit, the trio observes Draco Malfoy behaving suspiciously, which leads them to follow him into Knockturn Alley and witness him at Borgin and Burkes. This event fuels Harry's suspicion of Malfoy for the remainder of the year. The shop also demonstrates the twins' more serious side; in a back room, they sell a range of practical defensive magic items like Shield Cloaks and Peruvian Instant Darkness Powder, created in response to the growing threat of Lord Voldemort and his Death Eaters. After Fred's death during the Battle of Hogwarts, George continued to run the successful business. While he never truly got over the loss of his twin, the shop remained a lasting monument to their shared dream and ingenuity.

• Main Showroom: The primary retail area, constantly filled with customers and a cacophony of sounds from the various joke products. Shelves are crammed with items such as Extendable Ears, reusable hangman games, and various sweets.
• `Skiving Snackbox` Display: A prominent area dedicated to their flagship product line, which includes Nosebleed Nougat, Puking Pastilles, and Fainting Fancies. These were immensely popular with Hogwarts students looking to get out of class.
• `WonderWitch` Products Section: An area with pink-themed branding, dedicated to products aimed at witches. This section features items like patented Daydream Charms, guaranteed ten-second Pimple vanquishers, and a variety of Love Potions. Ginny Weasley's Pygmy Puff, Arnold, was purchased here.
• Back Room: A darker, more subdued area where the twins sold more serious and practical items for Defence Against the Dark Arts. Merchandise included Shield Hats, Shield Cloaks, Shield Gloves, and Peruvian Instant Darkness Powder.

• In the film adaptation of Harry Potter and the Half-Blood Prince, the shop's exterior is vividly brought to life, complete with an enormous, animated figure of a twin in orange robes who magically tips his hat to customers entering the store. The interior is depicted as a multi-level emporium of magical chaos and colour (film).
• J.K. Rowling has stated in interviews that after the Second Wizarding War, Ron Weasley worked with George Weasley at the shop, and together they turned it into an even more massive financial success (J.K. Rowling interview).