Board Thread:General Discussion/@comment-31981697-20170722123329/@comment-27136653-20171020204728

Oh wait, did I really write 201X? I meant 211X. And the annoying dog is not Toby literally, so stop calling him an "AU" Toby, since that doesn't even make any sense. As I said, he merely represents Toby. And that's canon.

And you used the mushroom to flip everything upside down, blatantly ignoring other facts, such as, that the annoying dog representing Toby is an established fact. So you cannot use some tiny insignificant detail to disprove it. The white mushroom shape doesn't even have to mean anything at all, since Toby definitely didn't put that much detail into this game. Certainly not as much as we're searching for.

People also speculated that due to some differences, the boss monster in the intro couldn't have been Asgore, but Temmie Chang fixed that in the art book. It didn't prove that it was Asgore, but at least it debunked the speculation that the boss monster had a broken horn. Same thing could be with the mushroom. It certainly bears no significance, and you'll be a fool to claim that this tiny detail changes everything. Since even Toby Fox himself would disagree with you on this.

Besides, I can argue that the other logo on the box IS the Undertale logo, so that disproves your mushroom theory.