Yes, you can copy an Amiibo to another NFC tag. It is listed here on the forums on HOW TO DO IT.
YES it is also possible to use your phone AS AN NFC TAG with HOST CARD EMULATION. However, nobody has yet developed an app (that I know of) that uses this feature on android phones.
YES it is also possible to use your phone AS AN NFC TAG with HOST CARD EMULATION. However, nobody has yet developed an app (that I know of) that uses this feature on android phones.