Mr. Potato is the headteacher in Riddle School 3. He probably likes playing games, because when Phil grabs the key, Mr. Potato isn't taking notice of.

Mr. Potato
Mr. Potato
Riddle School 3
Gender Male
Favorite Thing Video games
Least Favorite Thing Real life

In riddle school 4 It says he died after beating a game called riddle school 3. It also says he found his love of video games slightly before Riddle school 3