Poptropica on Nintendo Wii: Not Available

No, Poptropica has never been released as a native title for the Nintendo Wii, Wii U, or any other console. It is a web-based browser game—originally built on Flash, now running on HTML5/Unity—and is only playable on devices with a compatible web browser and internet connection:

• Windows, macOS, Linux computers
• iOS and Android phones and tablets (via browser or the Poptropica app)
• Chromebooks

The Wii’s Internet Channel (Opera browser) was discontinued in 2017 and never supported the modern web technologies Poptropica requires.