Today, I finally spend time to play this event in Jpmm (Because Aumm is not interesting? Haha)
To kill Mameo in all maps, and collect eggs from drop. Not so many Mameo in the maps, the drop is not very good too. Send the eggs to South Rudis Back NPC, you will get the rewards. (I wait arisa online to get this informations, my reading skill in Japanese still weak Haha)
There are many updates in Jpmm, you can improve you Mix Skill by having the cores pictures in your Mix Skill, so that you can have the records what kind of cores you have success in your mixes.
My first success is Pupuru, I wrong said it was PuruPuru. Haha...