3ds games, your looking at gateway, stargate, and sky3ds+, all of which no one will recommend as gateway is outdated, and dev team has given up on it. stargate is made by same team and have quit on the card, and sky3ds is a expensive cart which can get you banned more easy if ya dont know how private headers work for the cards. You would want to look at cfw, its free and you dont need cards to install 3ds roms.
https://www.nds-card.com/ProShow.asp?ProID=575 would be the card you would look at for the DS games.