It is a Pokemon style game.
Also on JB Hi-fi https://www.jbhifi.com.au/products/nintendo-switch-temtem Credits @videoman
Story Campaign: Journey across six vivid islands and embark on the adventure of becoming a Temtem tamer while fighting against the evil Clan Belsoto.
Online World: The days of traveling solo are over; in Temtem the world is a massively multiplayer one. Tamers from around the world can join and you will be able to see them around you, living the adventure with you and fighting to become the best Temtem tamer.
Co-Op Adventure: You will be able to join forces with a friend any time and work together towards your next goal. Catch new Temtem, complete a Route, or face off against a Temtem Leader; all while fighting alongside your friend in dual battles!
Housing: Buy your own house at Atoll Row and decorate it your way. Buy new furniture, color your walls and you’ll be ready to invite your friends over!
According to the cover: