Greenleaf Elixir is an elixir/dye that is sold by Slurps and Burps.
In Nightfall, Dex uses it on Iggy, Sophie’s pet imp, to turn him green, along with Floof, which is also sold by Slurps and Burps.
Quotes[]
“I picked the color for Forkle–or I guess I should say it's for the Forkle we lost. Hope you don't mind.”