Here's why:
* Delibird's role: Delibird is known for its delivery abilities, often associated with bringing gifts. It's more of a "runner" than a "rider".
* Stantler's strength: Stantler are strong and agile but not typically known for flying. They are more associated with being powerful land-based Pokémon.
While it's a cute image to imagine, it's likely just a fan-made creation, perhaps inspired by the festive nature of Delibird and the strong appearance of Stantler.
Here are some possibilities for why this image might exist:
* Fan Art: A creative fan might have drawn this image, imagining how Delibird could use Stantler to speed up its deliveries.
* Meme Culture: It could have started as a humorous image or meme that gained traction online.
* Crossover: It's possible someone combined elements from different media, such as Pokémon with a traditional Christmas imagery.
Ultimately, the image is a fun and imaginative take on the Pokémon world, even if it's not officially recognized.