>>56761882In-universe it is explained that Pokemon in Orre are a valuable product, wild Pokemon are extremely scarce, so it is logical that lacking resources the Orreans resort more to technology, for example who needs a motorcycle in Paldea if you can go out to the garden and catch a Cyclizar, do you need to move house? hire a Cetitan trailer, do you need an express taxi in Galar? hire a Corviknight, move to the next island to buy milk and cookies? use your Lapras ferry. Having a Pokemon in Orre is a status symbol, and they are used more as gladiators or weapons.
Now the real explanation is that one of the people in charge of making Pokemon Colosseum previously worked on Star Wars games and even made a manga of this franchise, as well as a cyberpunk erotic manga with sexualized motorcycles, when creating the first Spinoff they were given few resources, but absolute creative freedom (Like Team Silent) for this reason the protagonist is an ex-criminal, the mechanics focus on stealing, the region is a pit of perdition and the Shadow Pokemon are treated as weapons, in the sequel the tone was lowered by order of Nintendo.