Here's a pair of Casper shorts, just to prove that the Friendly Ghost is a spirit for all seasons.
First up is "Deep Boo Sea", from 1952. Casper doesn't want to scare, and so he gets a much bigger dunce cap, strengthening his resolve to make mortal friends. After that, in "The Witching Hour", Casper helps his BFF, Wendy, when an evil witch casts a spell on her house.
"Witching Hour" comes from the 1963 New Casper Cartoon Show, and, as such, has more of the familiar Harvey Comics look comics readers were familiar with.