Simply sound like how you think Peppino Spaghetti does, but a little "off". For example, maybe enunciation on the wrong syllable. Keep the tone somewhat joyful, even when it should be something different.

(Note: you may also be called on to be the actual Peppino, it depends on whether or not I can fit him in a song)

(Another note: I can give you a reference as to how the verses should flow, but for now just assume it goes at the same pace as "In the notepad, fates are written" from Too Slow D-Sides)