In Pikmin 4, there are several different types of Pikmin to produce and add to the collection. Specifically there a 9 different Pikmin, each with their own unique abilities and uses. Players will need to unlock all of them in order to progress through the game, however, each different type is acquired through different means in different areas.

https://screenrant.com/pikmin-4-how-to-unlock-ice-pikmin/