A:AnswerI believe Nintendo announced the discontinuation of the Grey and Neon Yellow Joy-Cons in Japan...not sure if that is going to affect us in the USA.
A:AnswerYes you can. I just purchased a second set of controllers and been playing games with four players. If you need all four controllers to continue playing you can use the extra charging station for convenience and have all controls charged at once. If you do not care about timely of charging. Then the system is all you need.
A:Answerjust slide them on to the the pad, and put the remotes and pad into the dock station to charge. They sell off brand travel kits too on amazon that come with a charging station.
A:AnswerI can also confirm that it is pink. I bought them because of the colors and my friends like the variety of colors when choosing their controller.