Pikachu
Unveiled at E3 2006, Pikachu (ピカチュウ, Pikachū) is a character in Super Smash Bros. Brawl. In the E3 2006, Pikachu didn't show its Final Smash like Mario, Kirby, and Link did. Visually, Pikachu has barely changed at all from its Melee design, only being larger and touched up slightly. It has all of its moves from the first two games.
It is currently in the B Tier and holds 9th position overall. This makes Pikachu closer to its original Top Tier status in Super Smash Bros, where it was ranked first place, as opposed to its Low Tier status in Melee, where it is ranked twelfth place. It is currently the highest-ranked character in Brawl that has appeared in all three Super Smash Bros. games, and also the highest-ranked in the Pokémon series. Pikachu's decent killing power, quick overall speed, good recovery and edge guarding, good chain grab, and Brawl's new physics have helped it a lot; Pikachu can no longer be so easily combo'd, its grab range is no longer the shortest (Ganondorf now has the shortest grab range), its Thunder is not as laggy, and it's gained various new tactics such as Quick Attack Canceling.
Samus Aran 
Samus Aran (サムス・アラン, Samusu Aran) is the protagonist of the Metroid series. Samus is the galaxy's most famous bounty hunter, constantly helping the Galactic Federation in their fight against the Space Pirates. She has appeared in all three Super Smash Bros. games to date.