And this is what happened. Going though a similar transformation as Berry Bloater but even more powerful, she was transformed from the Princess of Sun to the Queen of Berries. Berry Bloater herself was shocked, and soon found out if anything SHE was now going to be used as a puppet, the juice sloshing into Celestia's brain driving her even madder then the queens own creator.

Despite this madness she actually found an attachment to Berry, both being two ponies from the same vine now so to speak and to Berry's surprise they suddenly became close...VERY close...She now found herself as the new Princess of Equestria regardless of what the population thought, but it didn't matter for long as the new Celestia began tainting water supplies and poisoning food stocks with special juices to makes more ponies just like her only more rounder and sloshie. There are many who resist, her old student included but for now the kingdom is theirs, the sky turning purple and the land warping to suit the new fruity subjects.

Once again done by Ask Chubby diamond.

My partner called this one Berristia but it doesn't really roll off the tongue very well :/ If you have a better idea for her new name then please leave it in the comment.