Sonic Channel staff on their blog:
It is Knuckles being delighted with the harvested summer vegetables in hands!
There are corns, tomatoes, cucumbers, and also a watermelon! I wonder if he would have a barbecue with Sonic and friends under a tree. Or having summer vegetables curry. They look delicious~~
Yes! It is right on the mark up to the detailed scenes of straw hat and lots of vegetables in the basket.