What do the popo piggy banks do, what are these weird stones that have a chunk out of them and look like Mr.Popo, how do you use the mixer and what for, if your item clothes become dark with something like 0/100 can you fix them or do you have to buy a new version, and what are special hoipoi stones? :confused:
The popo-like item that don't take you to your popo stone revives dead party members.
You need to use recipies to learn them to use the mixer in which you need the ingredients specified. There's more threads that go into more detail that can be found by searching.
Any merchant can repair items by clicking on the hammer icon.
Special hoipoi stones do things like prevent the item from being destroyed when an item upgrade fails.
Binding means the spot you are bound to. It is where you will teleport when you die, or use a hoi poi stone. It's a term that was used back in the original EQ (EverQuest) days.
And yes, it also means you can't sell the item because it is bound to you.