what is this?

[YoukaiJSGB]

I found this in the STTBLL file folder but ...
What did you mean by this? Did I buy a submarine and send the instructions by e-mail and leave them in the world folder?

Text:
Dear MIKE JONES,

Congratulations on your purchase of the IRD Sub-C submersible. The Sub-C is
sure to serve your underwater adventuring needs for years to come.

Should you encounter any difficulties with your Sub-C submersible, please refer
to the Troubleshooting section below for answers to the most common queries.

TROUBLESHOOTING:

Q. I heard there's a secret room on the submarine. Where is it?
A. That's ridiculous! The submarine doesn't have any secret rooms behind
any invisible doors. And if it did, the secret door definitely wouldn't be in the air
between the first and second portholes from the left. So, it would be totally
pointless to try to jump between the portholes and press Up to enter it.

Q. I can't hear anything when I'm on the submarine.
A. It is possible that you may have bananas in your ears. Please remove any
fruit from your ear canal, then attempt to hear again.

Q. I'm trying to sail past two islands, but there's an old pirate ship
blocking the strait.
A. We recommend that you search for any ancient catacombs that may conceal
a device for sinking the ship. Please first locate a worm suitable for feeding to
a parrot, as it may be necessary to bribe the local fauna into speaking with you.

Q. Why can't I just take the submarine UNDER the pirate ship?
A. Shut up.

[glitch4]

The file had nothing to do with the Mario, so it was just a mistake.

[Cedur]

Yes, congratulations on having bought a submarine.

okay maybe it's just an in-game dialogue. Anyway thanks for making me excited about STTBLL

[FireyPaperMario]

It might be a random click bait... IDK

[Cedur]

It might be a random click bait... IDK

STTBLL stands for "Super Talking Time Bros the last levels". This thing here is just a .txt file, and once you start the game and go through the prologue story, you can immediately conclude that this stuff also pertains to the episode's story.

[nothere]

That file seems to be...kinda random. If no submarine has appeared at your house yet and doesn't appear within the next few weeks, I'd say it's best to either delete the file and/or have the purchase of a submarine be part of the story.

[xDestroy]

Shoutout to Mike Jones for having a submarine.

[Cedur]

Oh, my first experience with Super Talking Time Bros was also a bad one. Horrible lag right in the first level for no visible reason, I hope I will be able to play it somehow.

(Since it's a modified 1.3 build, I guess it should be possible to make this a 2.0 build by just duplicating the 2.0 folder and replacing the graphics stuff)