Before "Shake Hands with Danger" (1980) and even before "Last Clear Chance" (1959), there was "PLAY SAFE" (1936), from the same studio that brought you Betty Boop and Popeye.

"PLAY SAFE" is the charming public-domain animated tale of a boy and his dog . . . as they navigate a hellscape of anthropomorphic demon trains who just want to warn the young fellow that it's dangerous to fall unconscious on the train tracks! All of this cautionary whimsy is set to a musical score that sounds like Minnie the Moocher's drunk uncle, Vinny.

• https://youtu.be/AUrOCEt3Olo
• https://www.imdb.com/title/tt0028110/
• https://cdn.discordapp.com/attachments/378382803580223490/711052523976392714/unknown.png

Animated ripoff of the beloved Neil Gaiman stop-action animated classic, Coraline.
https://www.imdb.com/title/tt4789650/reference
https://www.youtube.com/watch?v=C6kPeM-KydQ

This movie stars Robert michums other son and the whole time he mills around like he’s not even in a movie this is prime riffing as the plot is stupid the acting and dubbing are completely awkward this movie is perfect

It’s eerily similar to the 2020 pandemic. It stars Dom DeLuise, Mary Tyler Moore, and George Peppard. I desperately want to see it, but it’s hard to find, and even if I could find it I don’t know that I could handle it without the wonderful RiffTrax treatment.

We all could use a little Dario Argento inspired riffing.
https://www.imdb.com/title/tt0090930/reference
https://www.youtube.com/watch?v=mnWatgDIccM

What seems like a charming, Japanese animal movie at first soon takes a sudden dark turn....

Absolutely low-budget CGI nightmare. Great for Halloween season.
https://www.youtube.com/watch?v=zbTfdS-D98w
https://www.imdb.com/title/tt7547510/reference

The Cascadia Treasure:
The family and I ran into this movie while looking for a good family movie. Well... it was good... BAD good. The kids and wife kept laughing at the bad cinematography, weak story, mistakes, and bad acting. This movie deserves a Rifftrax treatment!
Here’s the IMBd:
https://m.imdb.com/title/tt5437198/

https://en.wikipedia.org/wiki/InvasionoftheStarCreatures

Starring Miles O'Keeffe (with real, not the dubbed-for-Ator voice) as Liberty and Lou Ferrigno as Bash. if that's not enough to get your riffin' jimmies a rustling I don't know what will

I repeat starring Miles O'Keeffe and Lou Ferrigno!

This BBC made for TV movie is an utter hot mess and would make for amazing fodder for the boys.

A young boy and his family embark on a series of adventures when the boy finds some mysterious eggs which hatch to reveal a brood of baby dinosaurs. Imagine if someone actually tried with "To Catch A Yeti" but with baby dinosaurs. You get a fairly good film with some 'ok' comedy but still full of 90's cheese that somehow got 2 more sequels!

My Daughter had to do a short film for her school project. Being fans of MST3k and Rifftrax she asked if I could request a riffing. I said what the heck so here is the request.
2 Souls is about a girl named Heaven. Heaven is has a curse. She has another side to her. A demon side. The demon is named Nevaeh. Nobody except for Heaven can see Nevaeh. Heaven is trying to control with Nevaeh. Little does Heaven know that someone is always watching her. The one who gave her the curse.

its a 1980's action film (not a half bad one). not as good as The Wild Geese, but still. also Sir Patrick Stewart says this film is the his most embarrassing role he had.

Adam West, the mother of Alien ***** Girl in The Visitor, and two of Cameron Mitchell’s adult children in the mystery of an abandoned space ship solved with the aid of a psychic scientist and some soporific cross fades.

https://www.youtube.com/watch?v=rbXkDbknSG0

One of the worst Godzilla knock offs. they even mentioned his name twice. Straight from Korea in 2019 To the discount bin at Walmart in 2020.

Nato history channel as a list full of these for different countries, all utterly ripe for riffing. They all have that way-too-serious narration that 50's documentaries and shorts have that would make it absolutely perfect.
They are all free to watch on youtube as well!
Here's the one on Iceland: https://www.youtube.com/channel/UCLXVOXd7TU2-YixUWqUfWQw