: Janemba traps King Yemma in a crystal barrier, preventing him from managing souls.

If you're interested in the production side, I can look into:

: After Goku's Super Saiyan 3 form fails to stop Janemba’s second transformation, he and Vegeta must perform the Metamoran Fusion Dance . After one failed attempt that results in the obese Veku , they successfully form Gogeta to end the threat.