While they rested, Son Gohan also had Goku teach him Planet Metamoran's Fusion Technique.
Planet Metamoran's Fusion Technique was actually very simple.
Its main component was a Fusion Dance, which Son Gohan learned after watching it once.
The next requirement was for the two people fusing to synchronize their ki, which was not difficult either.
Combining the two without making any mistakes would result in a successful fusion.
Successful fusion: produces a powerful warrior who surpasses all limits. Fusion duration: 30 minutes. Skill difficulty: 1 star. Skill rating: game-breaking.
Over the next month...
Whenever Son Gohan had time, he went to the Sacred World of the Kai to learn how to create an other-dimensional space from the Supreme Kai.
After studying for an entire month, Son Gohan finally mastered it and created an other-dimensional space of roughly two cubic meters.
He stuffed his Storage Capsules and some important belongings inside. Retrieving them whenever he wanted was far more convenient than before.
During the second month, Son Gohan took Trunks to Hell to visit Vegeta.
Vegeta was still as cold as ever, as though he would forever turn his back on the world.
Even the arrival of his own son, Trunks, could not shake his resolve. He remained utterly aloof.
However, Son Gohan sensed that Vegeta's physique had grown stronger, probably because he had been training desperately ever since receiving a physical body.
Seeing that Vegeta seemed unwilling to see him, Trunks looked rather dejected.
But just as they were about to leave, Vegeta said something that cheered Trunks up again.
"Trunks, you've done well all these years..."
During the third month, Son Gohan and Trunks visited Planet Yardrat again.
They went to learn the technique they had not had time to learn before.
Giantification!
Planet Yardrat's Giantification