De or het sprintkoning?

The correct Dutch article is:

de sprintkoning

Rule Words ending in -ing: almost always de. See the rule

How to use sprintkoning

the sprintkoningde sprintkoning
this sprintkoningdeze sprintkoning
that sprintkoningdie sprintkoning
our sprintkoningonze sprintkoning
your sprintkoningjouw sprintkoning
every sprintkoningelke sprintkoning
which sprintkoning?welke sprintkoning?
a big sprintkoning / the big sprintkoningeen grote sprintkoning, de grote sprintkoning