By careful against the asking price today is often linked to speculative All amiibo figurines cost between 13 and 15, especially not pay double (see triple!) Because of a stock shortage that Nintendo promised to resolve the As.
Compatibility level of the figure for the Wii U (I have not tested on 3DS)
Mario Party 10: Unlocks amiibo Party mode lets you add tokens (you earn during the game to store) to this character and customize the trays in amiibo Party
Hyrule Warriors: Get objects as well as bonus weapons (like all amiibo)
Captain Toad: Treasure Tracker: Unlocks challenge a type of hide and seek in each course (beware, we must update the game to see this option)
Super Smash Bros. : Like all amiibo expected to have a character who will fight together and you advance level (until level 50). However at the time I write this text that does not work ... pending update?
Important note: a backup amiibo not one game, so you can not (for example) saving chips in Mario Party 10 and safeguard the level of a non-player character in Super Smash Bro. We'll have to make choices so!
