Happy Home Designer has unfortunately been getting stuck in my 3DS game slot. It won't "click" and eject. I'm not sure if it's the game or the DS that is at fault...
Has anybody had this happen before? What was the problem? How did you get the game out?
Maybe you're pushing it in too hard? Or sometimes you're pushing it in too lightly? Make sure you are not putting it in crooked, that will damage the card and the inside of the slot very easily, also you are aware that game cards need to be put into the slot with a certain timing to the rhythm right? Putting in your card with a slight tilt could wear down the plastic over time. Could your card have worn down and thinned down the plastic on the card? Or any nicks on it could cause the card to stick. As dumb as this sounds any of these flaws can cause your card to stick and not click in properly so it's very important to be aware of these may be the source of the problem.
Try pulling it out easy with a pair of tweezers(cover the sharp ends if you can or just use plastic ones), but make sure you don't damage the inside. I think I had Vita cards stuck like that before and as long as you are careful it should work. Or put something flate behind/in front of the card to make it pop out?