I feel your pain, I’ve been trying to collect one more picnic basket since forever. Eventually you will get a chance to collect that missing item; it’s by random chance that it will show up, and it can take awhile to happen. If you don’t have the “lucky with” emoji in your collection, you can try using emojis that are in the same “family.” For example, if getting the collection item is “lucky with” Simba, and you don’t have Simba, try using another Lion King emoji. Also, try going back to Mickey. I don’t know if Mickey is generally lucky, but I’ve had really good luck getting elusive items with Mickey. Finally, the more you play in general, the more chances you have of getting an elusive collection item to show up.