Ice Climbers (PM)
The Ice Climbers rank 16th out of 41 on the official tier list, placed toward the bottom of the A- tier and a distant drop from their placements in Melee and Brawl, where their positions were 7th out of 26 and 2nd out of 38, respectively. Their placement on the tier list is largely due to their volatile matchup spread, as Project M's expanded cast has provided them with more troublesome matchups than Melee or Brawl despite the Ice Climbers' expanded neutral and punish options.
Ice Climbers is a duo consisting of the characters Popo and Nana. The player, in half of the retained Brawl costumes plus the alternate costume, controls Popo, and Nana will copy the player's movements under normal circumstances, and vice versa for the retained other half of the costumes. In Project M, the Ice Climbers can no longer perform most of their infamous grab infinites, but are compensated with buffed recovery options and better options in neutral. Ice Climbers are capable of dealing substantial amounts of damage; The partner will copy the player's move and has the same damage output, effectively doubling their damage output while both Climbers are alive if both attacks hit.
However, one of the Ice Climbers' biggest strengths is also their biggest weakness. A lot of their attacks are a lot better when both Popo and Nana are present, so if one of them is KO'd, the player's options are limited. A notable example, and their biggest disadvantage Ice Climbers has after the partner is defeated is the poor recovery offstage; Belay only gives a small fraction of the height the move normally gains, and although Squall Hammer can travel a fair distance, its hitbox doesn't compensate for edgehoggers.
Changes from Melee to PM
The Ice Climbers have been modified to focus more on desynching and standard combat rather than on their grab infinites from Brawl and Melee. This is an overall nerf as wobbling and grab infinites previously contributed to their success at a competitive scene. Nevertheless, their arsenal of grab combos and mixups have been greatly expanded, and the Ice Climbers still benefit greatly from chaingrabbing, as seen here. To compensate, however, they have both been made slightly more competent at fighting on their own, without the aid of their partner.
Changes from PM to P+
A glitch involving their walk momentum has been corrected.
The AI-controlled partner now attempts to use Belay for recovery.
Up to date as of version 3.6.
Note: The damage is based off one Ice Climber, due to both of them having the same damage output.
In competitive play
The Ice Climbers received a costume based on the Polar Bear, an enemy from their origin game, Ice Climber.
Project+ also gives them a costume based on typical Russian snow clothing.
Z-Secret Costume: Plaid Patterned Ice Climbers
R-Secret Costume: Realistic Equipment Ice Climbers