i2i
Big Bad Wolf
Lillie is a nerd and all about researching and stuff pertaining to Pokemon so this episode sounds ideal for her. Guessing she could get a Z-Ring this episode or utilize Gladion’s for Subzero Slammer that or Magearna gives her the Fairium-Z or Shiron evolves / upgrades Powder Snow to Blizzard.
Or Lillie catches Magearna.