In Luigi's Mansion 2, there is a boo who speaks in binary called Boolean... At least, in the British release. In the US localisation, its name is "Combooter" which is a far less satisfying pun.

All right for a meme, but if you come to me, in person, and pronounce it [Boo-leen], I will hit you.

Boopurpledrank

True

I expected the second boo to be skinny

When you face him it's false when you face away the boo is true. I approve of the new super Mario coding language.