It will debut in the UK with a free Mario Tennis Aces trial, running from 9am on August 7 until 11.59pm on August 13.
The promotion is open to paid Switch Online members as well as those on free trials.
Additionally, from August 7 until August 20, Mario Tennis Aces will be discounted by 33 per cent, with progress made in the free trial carrying over if users opt to purchase the game during this period.
Nintendo of Japan is set to offer Switch Online members a free Captain Toad trial between August 5 and August 11. Labo VR support is also being added to Captain Toad.
Over 10 million Nintendo account holders have signed up to Nintendo Switch Online, according to the platform holder.
On Tuesday, Nintendo revealed that lifetime Switch hardware sales are approaching 37 million units. Mario Tennis Aces is Switch’s 10th best-selling first-party game with 2.75 million copies sold.