I dunno if their one of his official sponsors but their supporting him, judging from his last name and Axis sponsorship he's from Quebec, and so is the Bite size marketing company. Obviously its a very savvy company, probably didn't take too much effort or money to get a big in the community company like J-skies to throw their graphics on pairs of whipits, but its pretty smart. NS actually had an article on it
https://www.newschoolers.com/news/read/Marketing-agency-Bite-Size-Entertainment-support-Games-skier-Alex-Bellemare-custom-pro-model-ski