In Pokémon Scarlet and Violet, instead of fast-travelling using the Pokémon you taught fly to, you can get around the map using the game's legendary creatures. Koraidon is a dinosaur-like Pokémon from the ancient past, whereas Miraidon is a robotic dragon from the future.
Miraidon proved the more popular of the two creatures at launch, and now it has been turned into a real prototype bike by the Toyota Engineering Society. As you can see from the image below, it's pretty lifelike.
There's next to no chance we'll ever be able to purchase one of these bad boys for ourselves, but if Pokémon ever wanted to release its most expensive merch item yet, I've got a good idea of where they could start.