Oh? That's a font the game uses, and Pointy also uses it for his trick counter! The font's in two separate sets of sprites, an outline and the letters themselves. The font files in srb2.pk3 you'll wanna reference are in Graphics > Fonts, and then for the outline the folder "NTFNO" and the letters "NTFNT".
No one I know of has made edits of these yet, and I'd love to see how they turn out if you decide to make some!