Professor Sycamore arrived in Hoenn to see Lexi and gave her an Egg that one of her Pokémon had hatched at her sisters Daycare. Not knowing which Pokémon it was, Lexi held onto it until it finally hatched into Shinx; however, this Shinx was special as it was Shiny. After revealing the hatched Pokémon to Hayley, Hayley then revealed that Luxray must have had an Egg with another Luxray she was looking after a few weeks prior. She remained on Lexi's team when she headed to Alola.
Shinx is a hyperactive and curious Pokémon, but is also found to be quite clumsy and shy around strangers. She is shown to be very loving towards Lexi and her father, Luxray.
Shinx's fur dazzles if danger is sensed, and can blind foes momentarily.