Not sure if this is an eggcorn, but "jool-er-ee" is almost universal nowadays.
Also, I keep typing "egghorn." I can't pronounce the the gg-c combination comfortably, I guess.
I can almost see and hear Sullivan doing his intro. rg, your friend's memory of the two names are quite accurate, I think. But, to be fair to Sullivan, I remember his retaining the "de," which resulted in "paah duh doo."
Bouree Fantasque is frequently referred to as Bouree Fantastique.
Petrouchka comes out Pet-roosh-ka.
Then there's the Shoshtakovich "Bright's Dream" (recently performed by the Bolshoi in London.)
How about Midsummer'S Night Dream.
Or Pictures at an EXPOSITION.
Or Tudor's The Leaves are FALLING.
Or Le Jeune Homme et L'AMOUR..
Or Le BLUE Danube (Massine).
Or L'oiseau de FER.
"Who Cares?" is often pronounced without the up-turn of the "?" -- resulting in a statement about ennui rather than one about insouciance.
And, I've heard the complete, full-evening ballets referred to as "Le Corsaire Pas de Deux" and "Raymonda Variations." Not to mention the time I heard someone refer to Robert Wilson's Einstein on the Beach as Einstein on the Roof.