A moveset swap is when hacking causes a character to take on the animations and moveset of another character. This is doable in both Super Smash Bros. Melee, Super Smash Bros. Brawl, and Super Smash Bros for Nintendo 3DS and Wii U. Results vary; some characters can impersonate others with no trouble (most commonly clones or semi-clones, such as Fox and Falco), while some combinations are unstable, freezing the game when some moves are used (or even as soon as the match is begun).