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 - Wikipedia
Joy-Con - Inkipedia, the Splatoon wiki
Joy-Con – Wikipedia
Nintendo Switch Joy-Con (L) Wireless Controller The Legend of Zelda: Skyward Sword
Nintendo Switch - Wikipedia
Nintendo Switch - Wikipedia
Nintendo Switch, Nintendo Wiki
Joy-Con - Wikipedia
Joy-Con – Wikipedia
Joy-Con Controller, Nintendo
File:Nintendo-Switch-JoyCon-Rail.jpg - Wikimedia Commons
Nintendo Switch (OLED Model)/Gallery, Wikitendo Wiki
Joy-Con - NintendoWiki
Joy-Con Controller, Nintendo
Joy-Con, Smashpedia