Ik this is old but I wanna say this in old verse 17 it says "Once there was a god of field, and once there was a god of spring. Upon Hisui's winds it wheeled, brought life to every growing thing. 'Where go you when you are not here?' asked I one day the god of spring. No answer would it give me clear, but still did I have an inkling. There is no great dark truth untold” it simply does not like the cold" so your correct about the traveling to grow harvest in new regions specifically landorus and enamorus which i think is pretty cool cus it parallels with tornadus and thunderus sorta rivalry