If it were just a stand alone sci-fi fantasy movie, it would have been fine. Super Mario Bros was literally the first movie made of a video game's IP, and it was so butchered - it reminds me of the Superman sequel WB asked Kevin Smith to write.

Followed up with Double Dragon, Street Fighter, and Mortal Kombat. In fact if you look at the list they're almost universally horrible.

It's like they were intentionally made to be bad to be content for MST3K. And I just found there's a RiffTrax of it so I know what I'm doing tonight.