The most infuriating part of Bowser’s Fury is Bowser himself. King Koopa’s arrival can both ruin your day and grant access to previously inaccessible areas, meaning the bite-sized Bowser’s Fury is somewhat of a waiting game. But you don’t have to wait for Bowser to do his thing. You just need a Bowser Amiibo.
Source: Kotaku – You Can Instantly Summon Bowser In Bowser’s Fury With An Amiibo