Meelow on 19 January 2016
From Famitsu.
http://nintendoeverything.com/famitsu-sheds-light-on-zelda-twilight-princess-hds-amiibo-features/
The bonus dungeon is called Thorough Battle: Trial of the Beast.
Finishing the dungeon gives you a wallet of 9,999 rupees.
The Ganondorf amiibo makes you take 2x damage (so with Hero Mode that's 4x)
