Ah, Nail hammers this story again... (chuckle)
Anyway, you missed a few things. I do admit that I blew it with the entry of Juan and Shi there, but I have a few answers for the other things.
First, I admit that the whole humans-to-Sonic-world thing is a little overdone, but some people like their meat a little overdone. (Sorry about the bad joke, but I think the message has been conveyed.)
And the destruction of Eggman's robots? Well, you know how fragile those things are. If a robot can be shattered into a million pieces just by somersaulting into it, having a Chao ram it, or smacking it with a fishing line, I don't see why some karate moves and yo-yo tricks can't do the job.
Dr. Eggman not wiping out Sonic and friends? Since you took that part back, I'll not elaborate.
And one more thing. Pay attention to the set-up. What makes you think Juan and Shi won't rescue Sonic and his pals one by one? I'll let slip right now that Cream will be the first to be freed.
(ahem) On with the story!
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Chapter 2: Infinity Woods -
"Sure is creepy here," Shi said as she and her brother trudged through the forest. "I wonder why they call these the Infinity Woods."
"Don't know," Juan responded. "You wait here. I'll explore a little and see if I can find anything of interest."
As Juan walked off to the north, Shi looked around. The forest was very spooky, and had a mysterious feel to it. Every five or so seconds, lightning struck in the distance.
Someone emerged from the dense woods to the south. It was Juan! Both siblings were startled by this.
"Hey!" Juan exclaimed. "I said to wait back there!"
"I've been standing here the whole time," Shi retorted. "Your sense of direction is screwy."
As an experiment, Juan picked up a rock and tossed it as hard as he could into the dense woods. About a second later, the same rock flew out of the forest and clocked him from behind.
Juan and Shi quickly determined that they were literally getting nowhere. They needed to go in the right directions. What WERE the right directions, though?
At that moment, Juan noticed this engraving on a nearby tree stump: "The path of truth will be revealed to those who approach the flashes."
"See how the lightning keeps flashing?" Shi deduced. "I think we're supposed to follow it."
Juan agreed, and the two dashed a good distance toward the next flash of lightning. This part of the forest looked different than the last, so they had to be getting somewhere.
The two siblings alternated between running a few steps in the direction of the last flash of lightning and watching for the next flash, and eventually they reached a clearing.
"Curious clearing," Shi commented. "Must be something important here." Juan's response to this was a big "DUH".
In the middle of the clearing was a suspicious-looking flat rock. It took the combined strength of both siblings to move it, but when they did, a big hole was revealed. Not knowing what else to do, Juan and Shi jumped in.
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Well, that wraps things up for this chapter, but expect more!