Yves Guillemot claims that the Wii still represents almost half of Ubisoft's total business.
Speaking to Gamasutra, Ubisoft's CEO explained that the console's falling sales didn't necessarily mean that some third-party companies aren't making money.
"Today, the Wii still is 45 percent of our business," he said. "Just Dance, all those casual games, are selling extremely well."
Guillemot also reinforced the company's support for the Wii U, which he believes will take the Wii to "another level" of success through both its tablet controller and higher technical specs.
"Now to [what audience] will it be addressed? We don't exactly know yet. But the potential of the machine, and the tablet [controller], I think is a good way to improve the potential gameplay."
Nintendo president Satoru Iwata recently confirmed that the final version of the Wii U will be showcased at E3 2012.
"As we learned a bitter lesson with the launch of the Nintendo 3DS, we are trying to take every possible measure so that the Wii U will have a successful launch," he said in an investor presentation following the company's disappointing half-year financial results.