Marshall and Everest go cliff diving while on holiday!
My headcanon is that Marshall is a twunk, so while he has that twink look, he's still muscular due to his job as a firefighter. And Everest would be like 6'3 ft and freaking ripped, as she is the tallest of the girls in the paw patrol, and mostly due to her living in the arctic alone for most of her life and that high liver diet.