From SmashWiki, the Super Smash Bros. wiki
Aniki (Japanese: アニキ, lit. "big brother") is a Japanese smasher whose Link is considered among the best in the world, having beaten Ken with him in friendlies and competitive matches. However, he has switched his main from Link to Samus. Aniki also plays Dr. Mario and Mario. He is the older brother of Masashi, who is another one of Japan's finest smashers. Aniki has gained fame in the world for not wavedashing while still playing at a highly competitive level.
The term "Aniki" may also refer, albeit not as often, to "edgehopping" (i.e. "Aniki dair" is akin to "edgehop dair").
Super Smash Bros. Melee