DuckTales (1987)

S1E61 Dr. Jekyll & Mr. McDuck

Scrooge McDuck falls under the spell of a potion that makes him uncontrollably generous, leading him to give away his vast fortune. His nephews, Huey, Dewey, and Louie, must race against time to locate an antidote, or risk their uncle transforming into a lifelong philanthropist. As they navigate various challenges, the trio must work together to save Scrooge from his newfound obsession before it becomes permanent.