Throughout the IMAX 3D show of the Polar Express movie, Sonic sang along for one of the songs in the movie, going like this;
Sonic: It's a magic carpet on a rail, never takes a rest, flying through the mountains and the snow...
(Amy: You can ride for free!) If you just say yes, cause that's the way things happen on the Polar Express! (Amy: You bet!)
Wooo, wooo, the whistle blows, that's the sound of her singing, Ding, ding, the bell will ring... (Both: Golly, look at her go!)
You wonder if you'll get there soon, Anybody's guess... (Both: Cause that's the way things happen on the Polar Express!)
When we get there, we'll scream... (Both: YEAH!) We'll arrive with a bang bang bang, boom boom boom, laughing all the way...
After the song they sang along during the movie, they then sang another song that in the movie, has to do with refreshments.
Amy Rose: Hot, hot, ooh, we got it! Hot, hot, hey, we got it! Hot, hot, say, we got it! Hot chocolate!
Hot, hot, oh, we got it! Hot, hot, so, we got it! Hot, hot, yo, we got it! Hot chocolate!
Here we only got one rule, never ever let it cool, keep it cooking in the pot, soon YOU GOT...! Hot chocolate!
Hot, hot, ooh, we got it! Hot, hot, hey, we got it! Hot, hot, say, we got it! Hot chocolate!
Hot, hot, oh, we got it! Hot, hot, so, we got it! Hot, hot, yo, we got it! Hot chocolate!
Here we only got one rule, (Sonic: Here we only got one rule,) Never ever let it cool! (Sonic: Never ever let it cool, keep it cooking in the pot,)
Soon you got Hot chocolate!
His song finishes as they watch the rest of the enchanting, believing and magical Polar Express movie, which after the movie a few hours later, was the IMAX 3D show of A Christmas Carol, which later in the show, Sonic and the rest sang a short song that was an old song a century or two ago.
All: Hark the herald angels sing, glory to the newborn king, peace on earth, and mercy mild, God and sinners reconciled,
Joyful all ye nations rise, join the triumph of the skies, with the angelic host proclaim; Christ is born in Bethlehem,
Hark the herald angels sing, glory to the newborn king!
After this short song, they experience the motion capture retelling of A Christmas Carol with Scrooge and the three spirits of Christmas, in IMAX 3D.
Another hour later, they left the theatre room and spent some more quality time, and when it was dinner in the dining room, Sonic and the others were delighted as they were eating as Mario and Peach sang from the Polar Express song they heard;
Mario and Peach: Children sleeping, snow is softly falling... Dreams are calling, like bells in the distance...
We were dreamers, not so long ago... But one by one, we, all had to grow up... When it seems the magic slipped away, we find it all again on Christmas Day...
Believe in what your heart is saying, hear the melody that's playing, there's no time to waste, there's so much to celebrate,
Believe in what you feel inside, and give your dreams the wings to fly, you have everything you need, if you just believe!
Trains move quickly, to their journey's end... Destinations, are where we begin again...
Ships go sailing, far across the sea... Trusting starlight, to get where they need to be...
When it seems that we have lost our way, we find ourselves again on Christmas Day...
Believe in what your heart is saying, hear the Kit that's playing, there's no time to waste, there's so much to celebrate,
Believe in what you feel inside, and give your dreams the wings to fly, you have everything you need, if you just believe!
If you just believe... (3x) Just believe... (2x)
When their song finished, Luigi, applauded to Mario and Peach's performance
"That's a wonderful song, fellas. Tomorrow, it'll be a week left until Christmas comes!", Luigi excites with her fellow pumper boy.
Sonic agrees, "My friends and myself the same. We got our letters prepared soon, and I hope we watch some more fantastic movies before Christmas."
"Didn't you hear? Star Wars: The Force Awakens is having it's one-year anniversary tomorrow! In IMAX 3D!", Amy told everyone.
Shun and Ryoko realize, "And we heard Fantastic Beasts and Where to Find Them has a one-month anniversary as well for tomorrow, another in IMAX 3D!"
"That seems like a good plan. Those great motion-capture movies we watched were absolutely magical.", heartwarmingly says Daisy, Ash hugging the latter romantic.
Misty added, "Yeah, and we're not like Scrooge from before. He changed to the better good, and so do I, but my heart upsizes three times with a change of heart, which changed me for good."
"Can't wait for the last week of our Christmas vacation. It'll be the best!" Sonic and Tails hopes, as everyone continues eating their supper.