General

So I found this article www.bbcgoodfood.com/health/nutrition/the-10-worst-ultra-processed-foods-you-can-eat
I was thinking:
2x monster energy drinks
1x loaf of white bread
1x box of cinnamon cereal
6x hotdogs
6x vegan hotdogs
1x bag of chicken nuggets
1x can of Pringles
2x microwavable meals covered in vegan cheese and margarine

This shouldn't be too challenging because these are pretty palatable foods. FF, what's your opinion?

Depends what your goal is, obviously. If your kink is being unhealthy, then choosing from that list would be fun. But those foods don't inherently cause a lot of weight gain. You might choose something else that is higher in calories, for instance.

And then there are others who like weight gain, but with a focus on health however possible. Eating mostly nutrient dense foods, but lots of it, and adding in high calorie feasts, means that you'll still get solid nutrition and feel pretty good in your gut, while also gaining weight.

Different strokes, you know.

All at once? I mean you could but you'd also feel like shit afterwards.

When I was trying to gain weight a while back my go to carbs were the little lemon cakes in the grocery store bakeries. Anything soft and sugary is gonna be very good calorie/dollar. Not sure how you feel about sugar but I can't help but notice you got lots of protein on your list. Protein will suppress your appetite a bit.

That being said protein is way more satisfying than empty carbs.