Sopo

Sopo, sometimes stylized as SoPo, is a term used to refer to playing as only the lead Ice Climber which is Popo, often due to the trailer, Nana, being KO'd. The term comes from a combination of "solo" and "Popo" (the lead of the default costume). It is also sometimes known as Sona or SoNa for people who use Nana as their controllable climber.

Sopo/Sona is more of a legitimate character than the similar Nolimar, as Popo/Nana's regular moveset remains mostly effective when their fellow climber is absent. That said, he/she does lose significant effectiveness, such as not being able to use a meteor smash or most chaingrabs, and is unlikely to recover from moderately strong blows due to not having a fully-functional recovery.

Tournament play

There have been some tournaments that allow a single Ice Climber to be used in low tiers, though this was more commonly found in Melee as it was quite easier to suicide Nana/Popo in that game by just Belaying too low. Some Ice Climbers mains are famous for their use of SoPo/SoNa, such as Chu Dat in Melee and Vinnie in Brawl. There aso used to be a combo video on Youtube which only consisted of Chu Dat's moments with SoPo.