I do love that big green A button. Hori has announced a line of GameCube-inspired controllers for Nintendo Switch in Japan. They have a semi-translucent design and connect to the Switch via USB.
【10月発売予定】「クラシックコントローラー for Nintendo Switch」が10月発売予定です！連射機能搭載で、疲れにくい軽量設計です！マリオ/ゼルダ/ピカチュウの3種類での展開です。
マリオ: https://t.co/oeKO2OCEKb
ゼルダ: https://t.co/gSXL4jFiQc
ピカチュウ: https://t.co/kjnSMGACOZ pic.twitter.com/NJP136Zh1P— HORI /ゲーム周辺機器のホリ (@HORI__OFFICIAL) July 24, 2018
The controllers will be out this October in Japan, with a Western release presumably to follow.
Source: Destructoid Nintendo Switch is getting three GameCube-style controllers from Hori