7x25 - Dragon Ball Z: Dragon Box

Eventually, Goku and Vegeta discover the real Gohan and company within Boo's body. As they rescue their friends and family from the fleshy cocoons in which they have been trapped, Boo's appearance gradually returns to the way it was before. In addition to their allies who had been absorbed, Vegeta discovers a cocoon in which (good) Boo has been trapped. Just then, Boo appears within his own body, and a fierce battle between Boo and the Super Saiyans begins!