Young Indy learned how to use the whip in his adventure with the Cross of Coronoda in Utah when he was 13.
In the Young Indiana Jones Chronicles he used it twice I beleive...
He used it in Spring Break Adventure (The Curse of the Jackal) when fighting Dmitrius. Let's see.... I KNOW he used it at least one more time. *thinks*
He uses a lasso in Trenches of Hell (not really a whip, though.
He uses it in Daredevils of the Desert OR Tales of Innocence... can't remember which... I may not be right on this.
He uses it in Treasure of the Peacock's Eye possibly... not sure... probobly not.
He uses it in Mystery of the Blues (as Harrison
He uses it in Hollywood Follies. The character he plays in the movie uses one, I think...
>_< He uses it at least 2 times, maybe 3 (not including Harrison's use)... but I KNOW at least 2...
He decided to use the whip on one of his adventures in Alaska. He has to get medical stuff to an eskimo village and uses a whip while using a dog sleed and that's when he decides to use it on all his adventures.
Maybe Lucas won't forget to have Harrison use a whip in Indy IV