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Dr Dunno

Doctor I. Dunno

Original Dr Dunno

Dr. Dunno's Original Design

Early Doctor Dunno

The Early Design For Doctor Dunno

Doctor Isaac Dunno met Simon, Birthday and Apricot just before they went into space, there he first uttered his catchphrase "Dunno".

As the series progressed, there became fewer ideas for his background and became a relatively minor character along with Elefun.