>>4172194475% of Pokemon sales are merch
Games are just a marketing cost to introduce new Pokemon and secure influencers and competitivefags
Improving quality in games is a cost that does not add to total sales
Pokemon games sell no matter what and a company wants to have as big of a profit as possible. So why add to the cost of it has no tangible benefit.
Those arcade machines have better animations and more quality added to them because their revenue generating potential is far more uncertain.