Planet Zets is the planet at the edge of the Universe, and also the homeplanet of the Lord of Universe Lord Zeron. Lord Zeron and his minions live on the planet. There are many aliens on the Planet as well, and it has been reported that the Planet existed for more than a thousand years.
A Zets Tournament was held on Planet Zets by none other than Lord Zeron himself. The Z fighters were invited, and Goku, Gohan, Piccolo, Future Trunks and Vegeta showed up. There were only 4 matches in the first round, and 2 matches set for the second round. There was only one match for the semi finals, and then the winner had to face King Cold.