the delibird shop adds up really fast tbh
you can produce them without using any earned currency once you reach blueberry academy's league club room. it uses pokemon materials to produce a random assortment of items, which you naturally get from killing wild pokemon, and you can literally farm master balls as well as other rare evolutionary/competitive/battle items (rare candy, ability patch, life orb, etc). literally 0 reason to ever use the delibird shop and you get so many duplicates that you can exchange them for currency (had ~8M from about 2-3 hours of using the item machine at max grade)
[automerge]1742077713[/automerge]
all from the Item Machine located in the Blueberry Academy League Club Room