James Buchanan “Bucky” Barnes Jr. is a fictional character appearing in American comic books published by Marvel Comics. Originally introduced as a sidekick to Captain America, the character was created by Joe Simon and Jack Kirby and first appeared in Captain America Comics #1
Black Panther is a fictional superhero appearing in American comic books published by Marvel Comics. The character was created by writer-editor Stan Lee and writer-artist Jack Kirby, first appearing in Fantastic Four #52 in the Silver Age of Comic Books.
They appeared together in the 2016 movie “Captain America: Civil War”