I'm sure there are some. I was gonna refer you to
http://www.seventhgeneration.com/diapers but looks like they have prints on those too.
I hate that elmo and winnie the pooh are advertised on diapers.
What's the point really? The diaper is there to just catch urine and poo and will be thrown in the trash. Waste of ink, or whatever they use to print those diapers.
And the parents are paying extra for those branded diapers with all those characters.
After looking through honest.com website I see that they have plain white diapers available.
https://www.honest.com/baby/honest-diapers
Scroll down through there diaper prints and select white.
I'd gladly pay more just to NOT have cartoon characters on my child's diaper.