We know that Motion Control may be the intended way to play ARMS but not the only method of play. ARMS will also incorporate single Joy-Con play along with the Pro Controller, in handheld mode both Joy-Cons & The Joy-Con Grip.
In most cases, A & B buttons are used for left-hand & right-hand punches. X is to jump and Y is to dash. Pressing A & B at the same time will activate the Grab and R is the Rush move.
The original images can be seen on the Japanese ARMS Official Twitter page but we have included the translated images below, courtesy of Nintendo Life.
他のスタイルもお好みでどうぞ!
「ターゲットきりかえ」は3人以上のバトルで使います!#ARMSTips pic.twitter.com/zYFSJ5y6QA— ARMS(アームズ) (@ARMS_Cobutter) May 23, 2017
Source: Nintendo Life