It still works. [And Lin is certainly pleased about that.] Although it's not advised to use on some worlds, and seems to work entirely differently when in Equestria.

[ She turned into a unicorn but Bolin had been an Earth pony. What logic was involved with the breed selection there hadn't been revealed to Lin. ]

[ And then the cheerfulness fades from Korra's face, and Lin feels her own smile slip, though she keeps uncertainty from becoming visible. Instead, she regards Korra with a long, measured look. To be worse than the loss of your bending.. That had to be serious indeed. ]

..Come with me. We'll get you settled at the hotel. You can tell me the details later.