Mine has to be Dragon Quest: Rocket Slime, a DS spin off of the Dragon Quest series that sees you playing as a slime operating a tank and rescuing the people from your town. You run around the overworld, collecting items to use as ammunition and saving money to upgrade your tank. The art and music are just as great as you'd expect from the Dragon Quest series. It made fantastic use of the DS's dual screens. It's also written for a younger audience, so a lot of it is just really silly and fun! Try it out for sure, I'm so sad there's no sequel :(
Deeper cut—the same dev has a game called a the Hex and I can never get anyone to play it, but it’s fucking brilliant. I rate it higher than Inscryption. People see preview and nope out because of the graphics. I went in blind and the graphics are explained after like 30 minutes. It’s genius and amazing and the least appreciated game I’ve rated higher than an 8/10.