The Energy Sphere is the 233rd chapter of the Dragon Ball manga.
Cover
The cover of this chapter shows Goku with his hands held high in the air, with Great Ape Vegeta towering over him. Vegeta is wearing damaged Battle Armor.
Summary
Gohan and Kuririn see the bright sphere Vegeta used to transform into a Great Ape and thet try to return and help Goku while Vegeta injures Goku. Goku tries to create a Spirit Bomb.