>>35145095That wasn't an official poll by Nintendo Dream, though.
This on the other hand is a much bigger and official survey, and it was ultimately done to determine what Pokemon will receive a special treatment in the future - especially in the merchandise department.
Unsurprisingly, all the top positions were taken by Pokemon who already were known to be incredibly popular in this regard, and the results were predictable. No reason to believe it was rigged, the most beloved Pokemon are all there and they have been in this position since the beginning of the gen.