Online store, stationery store, Ultraman theme store.

1. Online stores: Ultraman pens can be purchased at online stores such as Taobao, JD.com, Tmall, and Amazon. On these e-commerce platforms, you can browse different Ultraman pen styles and brands, compare prices and quality, and choose the product that best suits you.

2. Stationery store: Ultraman pens can also be purchased at stationery stores. In the stationery store, you can directly see and try Ultraman pens, compare different brands and prices, and choose the most satisfactory product. At the same time, you can also get professional advice and services.

3. Ultraman theme store: If you are an Ultraman fan, you can also buy Ultraman pens in the Ultraman theme store. In these stores, you can find many Ultraman-related items, including Ultraman pens.