The fact that Mr. Bean became a "Sir" was never mentioned in any other episodes.
(Mr. Bean comes zooming down the hill in his cart)
Mrs. Wicket: Oh no. It's that Bean kid!
(Mr. Bean bows to the queen)
Queen: Arise, Sir Bean.
Ask a kid, Mr. Bean wanted the car he currently has now. He even got a toy of that car for Christmas. When it broke, he used the front of the car as a mask.
In Royal Bean, the first time you see the queen, there is a large painting on the wall of a character that looks suspiciously like Edmund Blackadder.
Mr. Bean used to have Teddy and a panda Teddy but the bullies (later known as the criminals) ripped the panda Teddy.