you could try it and if it installs successfully you do have a recovery mode (rename fwtool.nds to bootcode.dsi) incase launcher gets deleted (note this will remove the exploit)
As nocash said this should work on all versions as long as you have a dsiwarehax app installed. But unless nocash makes this open source or makes some sd redirection + other stuff we'd probably rather have rocketlauncher
try cleaning the contacts of it hm its either that or it has a problem with its contacts or something. other time i got my 2ds to lock up cause of a cart it was a bad firmware flash :/ (on the cart)
ones getting sold these days are 1:1 clones which are pretty much like reproduction carts i think? i remember seeing a post where it's said that the flashcart design is actually sold to sellers? or manufacturers of flashcarts. either that or they're reverse engineered