Mickey Mouse's character design as of 1930 is in the public domain. But if you ask an AI image model for "Mickey Mouse", you'll probably get something based on more recent versions of the character which are still copyrighted.
Scroll down on this page[0] and you'll see the different Mickeys and most of them are not under copyright. You got Steamboat Whillie + gloves but no Fantasia Mickey or later. Definitely no red-pants version.
Unsurprisingly Disney knows what they're doing and they have 95 years to modify a character's looks (and how the public imagines that character) before it enters public domain.
Mickey mouse is now copyright free, pluto is in two weeks, then pretty much the whole roster by 2030 https://michelsonip.com/news/disney-characters-in-the-public...