So Disney.fandom.com says "Toodles is a super computer that is always there to help Mickey and the gang, find the answers they need. He is always shown to come when Mickey and/or one or all of his friends calls "Oh Toodles". In some episodes, he is just a helper with no face and no voice, who comes to Mickey and his friends when called. However in later episodes, he's portrayed as a good friend to them."
I can't afford a supercomputer right now. And I tried calling "Oh Toodles". It didn't work ) :