Which species of Pokemon exist changes over time to reflect their surroundings. Most pokemon based on modern technology are likely products of their modern surroundings, including electric types. Electric types probably wouldn't exist 500 years ago, in a society without electricity.
But there would be no need for many of the technologies used. I doubt there would be cars when there are Pokemon that goes faster. Cranes when there are Pokemon that are stronger. It's the same as who would ride a car that is faster than a horse. There would maybe advances in terms of domestication.