Since I play Guilmon from the Japanese version and not everyone knows the Japanese reference, I will provide some clips that showcase his voice and other quirks.

A Meeting with Impmon
Growmon evolves!
Enter Dukemon!
Culumon and Guilmon debate whether to play or not.
Image Song: Guilmon March
Image Song: Futari de La La La

I'll add more material if I see anything that strikes me as useful. C: