Dragon Ball GT: Pan's Darkness Within

After a hard battle against Baby, Goku thought Baby was out of commission. But Baby has turned his granddaughter Pan against him and Trunks. To save Pan, the Saiyans had to drive Baby out of her body. But when Pan absorbs the Saiyans' life force and becomes a Super Saiyan Goddess, the tables turn. Goku's only hope is to ascend to Super Saiyan 4. Can he do it in time? (Rewriting)