Chapter 2:

The inside didn't look much like a cave; it looked like some kind of science facility.

"This place amazing!" said tails. "There is no way uncle chuck made on its own!"

"don't underestimate uncle chuck," commented sonic. "for now let's focus on finding his message."

"There a multiple doors here," noted tails. "but they all use body scanner systems."

"uncle chuck probably thought of that," said sonic. "I am gonna try all the scanners, the one that opens is the one we'll take."

So he put his idea in motion and tried every single scanner, but no any of the doors opened.

"I don't get it!" said sonic.

"maybe this is part of the test!" suggested Tails. "we need to think, there has to be something only your or me can do."

"witch means only me." Thought sonic.

"Okay so how can I get a door opened with speed? you know besides going right throw it." asked sonic.

"let me think for a second; we have to use cartoon logic here." Said tails.

He thought for a while the said:

"Your body building is similar to uncle chuck's except the mustache, so if you are fast enough to move out of the scanning wave before it scans your face it might, just might open." Said Tails.

"so…" started sonic in confusion.

"you move from the way before the scanner get your face." Said tails.

"piece of.." started sonic before tails cut him.

"NO!"

Meanwhile:

Knuckles was at meh burger, sitting alone on a table, a pile of empty milkshakes on his table.

"Get me another milkshake!" he yelled.

"don't you think you had enough?" asked Dave.

"I'll stop whenever I want!" yelled knuckles.

Dave got him another shake and knuckles started drinking.

"told you he was too stupid to actually go to the bar." Said sticks who took a sit next knuckles while amy did the same on the other side.

"are you okay knuckles?" asked Amy. "If you want to talk sticks and I are all ears."

"I am pretty sure they say Both when there are only two people." Said knuckles.

"… I think he is okay." Said sticks.

"Listen knuckles," started Amy. "I know you are upset that Uncle chuck didn't ask you to go with Sonic and tails."

"Oh no really it's okay." Lied Knuckles, "it's okay if he didn't even mention me in the last worlds I'll ever know from him."

But then he started crying.

"oh Knuckles don't cry." Said amy.

"I am not crying!" lied knuckles, "I just have that thing that people use as an excuse when they cry in my eyes!"

"Did you even meet Uncle chuck when he wrote that letter?" asked sticks.

"Of course I did! Why would I be crying… I mean have the stuff in my eyes otherwise!" answered knuckles.

"but there is another letter." Reminded Amy, "maybe he did talk about you in it."

"If he did they why didn't he ask me to go with them and get it?!" Said knuckles.

"… I hate it when he actually thinks." Thought Amy.

Back At Sonic And Tails:

"okay so we might have an idea, but the question is : witch door do we open?" said sonic.

"maybe there is something on the map, let me see the letter." Said tails.

"nah I've got it!" said sonic taking the letter out of his… Skin pocket?... or just pocket.

He observed the map, but didn't notice anything that would help.

"Wait a minute!" he heard tails say.

He quickly folded the letter back and put in pocket afraid that tails might have seen the writing on the other side.

"why did you do that?" asked tails.

"eh… when I heard you… I thought we were under attack… so I hid it… so I can punch… you know…" awkwardly answered Sonic.

"… Okay…" said tails, "Anyway, I noticed something on the map."

"what?" asked sonic.

"try looking upside down." Said tails.

And he did, he noticed that when upside down the itinerary formed a number.

"It looks like a seven!" said sonic, "good job tails."

"Door number Seven it is." Stated Tails.

"let's just hope we are right and it's not just one big coincidence."

It wasn't.