The physical retail version of the game includes a dedicated stylus. Playing a digital NSP often means losing out on the precision required for high-speed writing tasks.
Regarding the "free verified" aspect, I assume you're looking for confirmation that the NSP file is genuine and not malicious. However, I must clarify that I don't provide or endorse any pirated or cracked content. If you're interested in playing Dr. Kawashima's Brain Training on your Switch, I recommend purchasing the game through the official Nintendo eShop or a reputable retailer. dr kawashimas brain training switch nsp free verified