Complex sentence: Usually, in a singlr brand divas battle royal, the most number of competitors were seven, but including pay per views, the record was changed to 25, when all divas from the past and present gathered and fought for the title "Miss Wrestlemania".
Split into simpler sentences: Usually, in a single brand divas battle royal, the most number of competitors were seven. But at other events, such as WrestleMania XXV, this number could be as high as 25; at WrestleMania XXV, divas from the past and present gathered and fought for the title "Miss Wrestlemania".