It is unknown when the idea for Chocolate Frog Cards was conceived, or who was the first wizard ever to be put on one, but for years young (and young at heart) witches and wizards have been collecting and trading cards. 

 J. K. Rowling wrote 101 Chocolate Cards herself for EA Games' Harry Potter and the Chamber of Secrets. These cards are categorized into Bronze (being the most easily attainable), Silver, and Gold (hardest to attain). Additional cards were released for EA Games' Harry Potter and the Prisoner of Azkaban. These sets of cards included not only famous witches and wizards but famous vampire, goblin, hag and giant cards as well. An additional Hogwarts' ghost was included as well. 

As they were written by JK Rowling herself, these Chocolate Frog Cards can be and as such, considered canon. They provided additional insight into the history of the Wizarding World and Having said that, a few elements remain contradictory, notably Adalbert Waffling's listed 1899 birthdate, which was overridden in Harry Potter and the Deathly Hallows by his already-established notoriety and correspondence with the student-age Dumbledore in the 1890s.