How to solo the elite four with Starmie Leaf Green with Hardcore Nuzlocke Rules

I would suggest getting two Lum Berries one for Lorelei and the other for the champ. Have at least one elixir, two ethers and two hyper potions. Make sure you are almost level 61 before starting because 60 is the level cap. You can very easily make Starmie a guaranteed encounter so you can always do this Strat.