I’m building my first HO Christmas train (DC silent) and have acquired a used, appropriately colored and tested Model Power “Fat Boy” 0-4-0 (weighted for stability and outfitted with knuckle couplers)
You did not specify the scale, based on the pictures I assume it is HO. I am a fanatic about Christmas and Christmas trains. Entering HO Christmas caboose into my search engine brings up a number of choices. The one I kind of like is a Lionel HO preorder (2554350) that would go well with your engine.
And I did same of course (searches)… and the searches also came up with several pre-order possibilities.
However, I’m hesitant to pre-order anything when delivery isn’t assured by a certain date. Many pre-orders mention “arrive by 12-31-26”.
Given this is a Christmas train… I’m not willing to risk a delivery coming after Christmas.
So I just thought it would be easy to buy a reasonably priced, used Christmas caboose with knuckle couplers (I’ve about had my fill of removing horn hooks and replacing with knuckle)
But alas… not as easy to find as I thought.
I may need to make my own or bite the bullet and pay a lot for a new caboose if I find one in stock.
Both of those have been delivered and show as sold out on the Lionel Store site. I do not see either available elsewhere. Unfortunately I do not have any miracle worker sources for HO items like I do for S gauge.
Because of the small wheelbase, it will stop a lot especially over switches with only one pickup wheel on the side it is put on. The only way I can think of fixing this would be adding tender pickup.