Researchers said bigfoots are extremely intelligent. If that's the case why do people that claimed to have seen a bigfoot say they stink?

Lots of highly intelligent people don't give much thought to hygiene nor decent clothes. Thinking about a story of Bill Gates getting his picture taken for a magazine and not realising his sweater had holes in it. Other geniuses are known as smelly greaseballs.

Ridiculous speculations. There isn’t research. No hair, bones, scat, and blood. It takes two to make one. Their alleged gene pool is zero.

Maybe they was smelling themselves after shitting there pants after Bigfoot scared the hell out of them

They're so intelligent they forget to bathe.

Well they may not have a very good sense of smell..

It could be pheromones to attract a mate.