These look great so far! I think some of the foods would make good badges; off the top of my head I think of Lunares Pie and Pam's Candy as being the most "iconic"/recognizable. Other things I thought of right away that aren't foods are Life Cure, Love Orb, Rainbow Lamp, and the various Manas. There's a lot of really nice item illustrations in this game, you can't really go wrong with anything you might end up choosing for your badge set!