Ar-key-us, but sometimes Ar-kay-us because of Silvally’s ability

Arkoos because of MandJTV

Its the first option.

Theres this pokemon handbook of all the pokemon, weights, heights and pronunciation.

Arkoos for fun

Are-see-us in all seriousness

RKS

RKS system

In the movie and anime its literally “Ar-Kee-us”

I dont know why this argument still exists

Ar key us

If it was are-see-us then the arc phone would be…

IIRC it’s called the Smarceus in Spanish