How do you reach 0 kelvin

Please, I'm trying to cryogenicly freeze my pet frog. I want to float him on a magnet, and have a zombie ghostie frog.

Technically you can't because you reach an asymptote, but I imagine if you managed to use antimatter, you could treat it as a vertical asymptote instead of a horizontal one and reach negative Kelvin, at which antimatter would become the prominent periodic / grouped table of elements, but even then zero point energy (0 Kelvin) would not be possible.

Absolute zero doesn't exist in our universe. Sorry.

Peace.