It's from the Funko Pop! Wetmore Forest Monsters line, his name is Smoots. There are two sizes and some are still available on Amazon Regular Size Smoots & Jumbo Size Smoots (though I'd advise checking other places too like Mercari and Ebay before jumping on buying him from Amazon - I'm not a funko plush collector, so idk if those are their normal asking prices for that particular plush or not)
Hope that helps!