* He replaced Creator/JeremyIrons in the middle of singing [[VillainSong "Be Prepared"]]... and it's barely noticeable if you even can notice it.
** And the best thing about it? Cummings [[PunctuatedForEmphasis DID. NOT. MISS. A. BEAT.]]
* Also replaced ChristopherLloyd in [[VillainSong "In the Dark of the Night"]]. Like in "Be Prepared", it's nearly impossible to notice.
* His interpretation of [[TheJungleBook King]] [[TaleSpin Louie]] was allegedly so accurate to the original he got Disney in trouble with Louis Prima's family.
* Jim Cummings as Darth Pooh. [[https://www.youtube.com/watch?v=eLXTDirrQ5w It has to be seen to be believed.]]
** The best part is how he even ''ad libs'' certain portions to match the Pooh character!
** That entire panel was equal parts awesome and funny. Sadly there aren't many recordings of his rendition of ''Film/GoneWithTheWind'' as [[Disney/ThePrincessAndTheFrog Ray]].
* His collective performance as the villainous Dr. Robotnik from SonicSatAM which many claim saved the character from mediocrity. Some even claim his performance is a crowning moment for ''the entire series''!
** And just to show his versality, he also [[https://www.youtube.com/watch?v=5EZ54vXrcVU voiced the same character in the pilot for]] ''WesternAnimation/AdventuresOfSonicTheHedgehog''. Despite being the same basic voice, the depiction and acting is made completely different according to the more clownish interpretation.
* Jim Cummings and Katie Leigh [[https://www.youtube.com/watch?v=yu7SDE-Lruk&feature=youtu.be read from "Darkwing Duck: The Definitively Dangerous Edition" comic]]... and some brilliant ad-lib from Mr. Cummings (read: "Pez dispenser").