Well, it doesn't have to be that. If the translators had no creativity, you'd get kururu and garufu. Although, usually ru is l, and I suppose if we did that for both of the ru's in karuru, that wouldn't work, but the official "romanization" is Krile (I've been to official Japanese websites) I think, so "Kril" is how you pronouce it I think. The ri part is soft enough that it sounds more like a ru, and the second ru is just an le.