Had a possible idea for Swalot could be tied to Meloetta where the super fans try to use it to imped the MC but he uses the surfboard to get over it. He would then meet her again and decide to fill her up. Another option for her would be to meet her on the ship. Since they can eat anything that there mouth can go around and is not picky on what it is it can be used in the ships garbage disposal system where she has kept that area spotless but there is now more trash than it can handle. Dont know if they are useful for Swalot.
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If I do end up doing a Swalot scene, it'll be in chapter 3 since that's Hoenn
I've got a bit of an idea on how to make her work, I might tie her to Shelly and explain that the Aqua grunts were using the Swalot to eat garbage on the beach and clean it up, but now she's refusing to do more if she doesn't get a treat, Shelly calls the MC knowing exatly what kind of treat the Swalot might like!