King Cold's planet is an unnamed planet that belongs to King Cold. This is the planet where King Cold took Frieza to recover after he found him among the remains of Namek.
The planet is green with sparkling lights. A team of scientists, led by a Malaka's race doctor, worked around the clock to rebuild Frieza's body there, creating Mecha-Frieza.
It is shown in Frieza's flashback. Like Planet Frieza 79, it probably serves as a base and an emergency hospital for the Frieza Force.