What are the 2 chocolate frog cards that Ron is missing?

Correct answer is– Agrippa and Ptolemy.

Ron Weasley said “chocolate frogs have cards, inside them, you know, to collect – famous witches and wizards. I’ve collected five hundred, but I haven’t got Agrippa or Ptolemy”. He said this to Harry on the Hogwarts express.

The chocolate frog cards which are also known as the Famous Witches and Wizards cards are trading cards collected and traded by students at Hogwarts. The cards are gotten by buying chocolate frogs and each pack contains random cards inserted into the pack.

There the 2 chocolate frog cards that Ron was missing were Agrippa and Ptolemy.