Got so caught up in wanting to open the blind boxes myself in hopes of Mahito, that I completely overlooked the part where... you have to get through the chocolate first...
20 of these...

They're like a knockoff kinder surprise. They taste pretty generic instead, but I found out they're better broken into tiny pieces than in large chunks? So they've all been crushed and thrown in the fridge.

I did get Mahito though. Worth it in the end!