From: KJH | #503
Wow, so the arguments for her literally involve her just seeing the future and vaguely powering up without any showings as far as I've seen of her ever doing so or ever really participating in battle.
I mean until you guys say something past "reality manipulation" and actually give a practical application or actual definition that doesn't involve a metaphysical debate on whether or not she exists in any form, Goku's got a lot going for him to take out whatever she is in that spot.
She can create an alternate reality at a universal level, replacing everyones memories, properties, etc. She did this with Haruhi, and she had like protection to stop it. Does Goku (or anyone else) have a reality condom? I don't think so.
She can also change the properties of things in whatever reality she's in too. Like making something really heavy, or whatever. It's not beyond her powers to make it so DBZ powerup or whatever not work.
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Chrono1219