Zelda OoT. In OoT I can beat the child part in an hour and thirty minutes to two hours. The other places I'm not sure, but I'm pretty fast at it. Besides the Water Temple. I still get lost, but I beat it pretty fast. As for a world record, most likely not.
Starfox Assault because I still have the highest total score, unless I see someone who has a bigger score. Most people play game for multiplayer, so there's hardly any competition.
I used to dominate in my neighborhood with Kirby in the first SSB. SOCOM: Fireteam Bravo 2 (PSP) and Metroid Prime: Hunters (DS) were two other games that I was pretty 1337 in. And while I'm still good at most games I play, I don't have the time nowadays to be as good as I once was...just can't sit around and practice for hours on end. So I can kick butt in Black Ops, but I'm not a ninja.
I am not sure how good I am at Tetris, but I have managed to max out the number of lines cleared on Tetris DS, which was 999 or something I think. I forget, but hey, it was better than average.
As for other games, uh... well I whooped everybody at Mario Kart DS back in the days, but was no way near World record level or anything, heh. All the other games I have, well I'm good at most, but not super good. Although I quite like my progress with Mario Hoops 3 on 3, I managed to beat every tournament with a 200 point lead in every match (which was pretty damn hard in the later tournaments on Hard mode).
Probably Megaman Zero 3.
I can beat the game without dying, which is incredible compared to how I usually am... *Dies for the eighteenth time on the first level of NSMB.*
I'm really good at the super mario galaxy games and kirby games.Also Donkey Kong Jungle Beat.I'm the worst at mario strikers charged/mario charged football.Maybe its just the horrible AI though.
SMG2 (100% and only three lives lost bitchezzzz!)
Any Kirby game. Well... almost any... DAMN YOU WHATEVER THAT GOLF ONE WAS CALLED! AND YOU TOO THE ONE THAT WAS ONLY RELEASED IN JAPAN!
*high fives SMF*
OH! OH! You know that Game & Watch game called "Fire". I'm so totally pro at the Modern version of Fire from Game & Watch Gallery 2 on the GameBoy. I got 2,000+ highscore on that in Very Hard mode, heh.