Fighting Mii Team
From the Super Mario Wiki
The Fighting Mii Team is a group of non-playable fighters in Super Smash Bros. for Nintendo 3DS and Super Smash Bros. for Wii U. They act as the games' Multi-Man team, similar to the Fighting Polygons, Fighting Wire Frames, and Fighting Alloy Team in previous games. Unlike the previous teams whose characters' have a set appearance, the Fighting Mii Team uses Miis that are in the player's system. The Miis' heads are loaded onto a pre-set body and are given either the Mii Brawler, Mii Swordfighter, or Mii Gunner moveset. While players can assign a custom moveset to their Mii Fighters, the Fighting Mii Team characters are instead randomly assigned one of the Mii types upon appearing on the stage.
Like with the previous installments, the Fighting Mii Team is encountered in the Classic and Multi-Man Smash modes. In Classic mode, the Fighting Mii Team acts as a penultimate boss, being fought directly before the fight with Master Hand. In both modes, the amount of Miis present and how strong they are depends on the difficulty. Usually, the Miis are incredibly lightweight, being sent flying just from a moderately strong attack. However, in Cruel Smash, the Miis are resilient and work better as a team. The main drawback the Fighting Mii Team has is that none of the Miis are able to perform special moves or edge grabs; they are limited to standard attacks, Smash attacks, Double Jumps, and Footstool Jumps off of their partners.
The Fighting Mii Team also appears as one of the final challenges in Smash Run. In this challenge, the participants have to defeat as many Miis as possible within a one minute time limit. During this challenge, Metal and Giant Metal variants of the player's character can appear to aid the Fighting Mii Team.
Trophy information from Super Smash Bros. for Nintendo 3DS / Wii U
In Super Smash Bros. for Nintendo 3DS / Wii U, the Fighting Mii Team's trophy is unlocked randomly.
Blue indicates the Trophy or description is exclusive to the Wii U version.