Doctor Aufbau (Aufbau is German for 'Building up') is Leopold's main teacher in RCT3Crashes100's Angry German Kid Series. He is shown to be very intelligent, and doesn't approve of messing around in his lessons.
Episode 2: Leopold goes to school
Doctor Aufbau is Leopold's teacher for the start of the new term, and instructs his pupils to write an essay on Otto van Bismarck. Leopold plays Pokemon SoulSilver instead, and gets suspended by him.
Episode 5: Leopold meets a Strange Person
Episode 6: Leopold and the Mysterious Orb
Doctor Aufbau leads MechaGodzilla into battle against Leopold, and they fight outside the Hotel Adlon. Doctor Aufbau dies after MechaGodzilla 2 gets a short circuit from a bottle of Leopold's cola, and explodes.
- He also has a son, called Jack Aufbau.
|RCT3Crashes100's Angry German Kid Series|
|Slikk family||Leopold Slikk (Blue Orb Leopold) • Harold Slikk • Anne Slikk|
|Arceus's Legion||Arceus • Dialga • Palkia • Giratina • Harold Slikk • Anne Slikk • Doctor Aufbau|
|Kaiju, Aliens and Ultras||MechaGodzilla 2 • Tiny Arstron • Minilla • Ultraman Belial • Yapool • Vakishim • Baltan • Dark Zagi|
|Minor Characters||Principal Gestalt • Jack Aufbau • Minilla|