That's right, it's Professor Templetrot, and his faithful assistant/time machine, Odyssey!
His "horn" is actually the operational end of his portal device. Do not look directly into it! The thing at the end of his tail is a highly adaptive data port. He can use it to jack into, and interface with, nearly any computer system in existence. Strangely, he has an odd preference for antique video game consoles. (He's damn near unstoppable at Street Fighter.) His tail can also function as a hand of sorts, which he can use to pick up and manipulate small objects.
Cardboard Chronicles: [link]