Best Buy Canada has a page for the Wolf amiibo, and it contains something that may interest you. You see, the overview section for the amiibo says that you can “tap the amiibo accessory to the NFC touchpoint on your game system to unlock this Space Pirate”. If so, this suggests that you can use your amiibo to instantly unlock characters in Super Smash Bros. Ultimate. Here’s what the page said about the matter in full:
Access a whole new level of fun and smash the competition with this Super Smash Bros amiibo. A former fighter in Andross’ army, the Wolf now leads his own mercenary team, and he’s not one you want to cross. Simply tap the amiibo accessory to the NFC touchpoint on your game system to unlock this Space Pirate.