Airbus: "We are going with Pratt engines for our Navy TH-XX submission..."
The PW200 is sort of in between the small and medium sized versions of the PT6. It's also completely unrelated (clean sheet design from around 1990). It's been one of the engine choices in the EC-135 pretty much since day one I think (the other choice is a Turbomeca product). When those engines were brand new in the 1990s, they were offered in the 135, the latest versions of the AW109, and the MD900.
The Coast Guard leased 109s with the Pratt engine. I think they had mixed experience with that engine-airframe combination... sorta to be expected when you take an executive helicopter and operate in off of cutter flight decks and fly low and fast in a saltwater environment... so I wouldn't hold that history against the engine.
The other dominant engines in this segment are the Turbomeca Arrius and the Allison 250 series.
(Full disclosure- I worked the PW206 in test cells in the 1990s, doing some development and certification work, but that was a long time ago.)