Oh yeah. I begged my mom to buy C-3PO's cereal. She did. I ate them. They were terrible. I'm still shocked that at that young age my intense love for Star Wars was not enough to make that cereal taste good.
All cereals like that are that way, I was into the Nintendo Cereal for a while and it tasted stale brand new but I had to have it lol. I remember having the Han and ghost obi mail aways from the 90s. They never really were worth much when i got rid of them.