Joy-Con is a mix-and-match controller for the Nintendo Switch. The Nintendo Switch Lite doesn't have any Joy-Cons. The Nintendo Switch OLED has glacier-white Joy-Cons. Joy-Cons are known for 'drifting'. There is special alternative to the Joy-Con that can be used in Pokemon: Let's Go Pikachu! or Pokemon: Let's Go Eevee! called Pokeball Plus.
Joy-Con, Smashpedia
Nintendo Switch Joy-Con The Legend of Zelda Skyward Sword Edition JAPA — ToysOneJapan
Joy-Con - Inkipedia, the Splatoon wiki
Nintendo Switch - Wikipedia
Joy-Con, Smashpedia
Joy-Con - NintendoWiki
Nintendo Switch Joy-Con (L) Wireless Controller The Legend of Zelda: Skyward Sword
Special Edition Joy-Con - Nintendo Switch Guide - IGN
Nintendo Switch - Wikipedia
Joy-Con, Smashpedia
Special Edition Joy-Con - Nintendo Switch Guide - IGN
File:Nintendo-Switch-JoyCon-Grip-Chargeable-01.jpg - Wikipedia
Joy-Con Slide - Super Mario Wiki, the Mario encyclopedia
Best Buy: Nintendo Joy-Con (L)/(R) The Legend of Zelda: Skyward Sword HD Edition HACAJAUAE