Ernie Prang

Ernie Prang appears in both video games

In Years 1-4
In the first video game, Ernie has no hair, and a different look. He only appears in the Knight Bus, but is a playable character. In the first level of the Prisoner of Azkaban, the player must use Dark Magic and then Ernie's character token will pop up.

In Years 5-7
In the second video game, Ernie has his look from the LEGO Knight Bus set. Instead of being found in a Level, Ernie's character token is found at the top of the Hogwarts staircase, before the part where the player must use Aguamenti to go further up the staircase.