if your talking about teh games, then Freeshop/ThatISOSite,
if you mean completing thinsg like the puzzles? Not sure, if you want to complete tehe puzzles easily atleast there are always Homepass Servers to generate you 8~10 streetpass hits every 8 to 10 mins. cheapest way to set one up is a RaspberryPi 3 w/ SpillPassPi SD Image
edit: i'm a freakin Dumbass, ok you want the games atleast (i cant help ya w/ the VIP Stuff) yea just use freeshop to grab the "DLC" but like any DLC everytime you enter eShop, you will haveto reinstall it!