"Footballs, worms, skateboards... um... action figures...dollies!" --BND leader before being hit by the cannon
The Supergirlifier Cannon was a much larger and more powerful version of the Girl Squad's Girlifying Rifles built by Madam Margaret before Numbuh 4's future self traveled back and time to correct the time period. It had the power to turn boys into girls, and male objects much girlier. The leader of the Boys Next Door was the last person it was used on.