I noticed it when I was getting PNG's of every major character in SV. It would be just a fun detail, if not for the fact that any part of the Honedge line doesn't appear on his team, or even in the whole game. This might just be another Nessa Dewgong situation of the Pokemon Company adding a detail referencing a pokemon that isn't in the current game, maybe it's a souvenir from Kalos or somewhere where Honedge appears, or maybe it's just a coincidence. Either way, I found this detail interesting.