* ActorInspiredElement: Wallace's banana-shaped mouth evolved from animating Peter Sallis's elongated vowels.
* AuthorExistenceFailure: Subverted. Peter Sallis retired from acting in 2010 due to his failing health, with Ben Whitehead succeeding him for various TV spots, but it was Sallis's eventual death in 2017 that ensured that he'd never voice Wallace again.
* ColbertBump: The series owes a lot of it's [[GermansLoveDavidHasselhoff popularity across the pond]] to Creator/NickPark accidentally leaving two puppets from ''WesternAnimation/ACloseShave'' in the back of a New York taxi cab during a press tour. The British press reported on it [[SeriousBusiness as if it were a national crisis]] and the American press reported on the British press reporting it as if it were a national crisis, in the process [[NoSuchThingAsBadPublicity introducing the duo to Americans]] and selling 2 million video cassettes of the first three films by year's end.
* TheMerch: Shortly after the release of ''A Close Shave'', companies took note of how merchandisable the characters were, particularly Gromit and Shaun. Plush toys, backpacks, key chains, alarm clocks and figurines are just a small helping of products you can find with their likeness slapped on.
* TheOtherDarrin: Ben Whitehead has been increasingly acting as the voice of Wallace, most notably in the ''Grand Adventures'' series, along with a number of TV adverts featuring the duo. Fortunately Whitehead's voicing is so near to Peter Sallis that most people don't even notice the difference. The only exception was in "Fright Of The Bumblebee", the first game in the Grand Adventures series. As it was Whitehead's first time voicing Wallace, he sounds a little different than he usually does. Fortunately, he seems to have gotten much better as he continues to voice Wallace.
* TheRedStapler: The last of the creameries manufacturing the centuries-old Wensleydale cheese were teetering on the edge of closure in the early '90s, until they received a chance mention in ''A Grand Day Out''. Noticing the increased interest, the creamery persuaded Aardman Animation to endorse a ''Wallace and Gromit''-branded cheese, which worked to rebuild Wensleydale into a thriving product worldwide.
* WriteWhoYouKnow: Creator/NickPark has stated that Wallace is loosely based on his father, who also liked to tinker, with a little of his brother, an electrician, thrown in for good measure.