Bastion/Daichi: Great Scott!

Syrus/Sho: Oh man!

Hassleberry/Kenzan: Sam hill!

Alexis/Asuka: Why don’t I have a catchphrase?

YGO! GX + Catchphrases

I loved this scene so much!

It's funny that this is the only time I remember Bastion saying great Scott in the entire series.