One of my personal favourites will always be the intro to Super Smash Bros. Brawl. When I got this game as a kid, I already was a pretty big Nintendo fanboy. I never heard of Smash at that point until my dad got it for me. And to then see that intro, with all those characters all looking so cool,with that music, in one of the best-looking games I had ever seen at that point, it really made a huge impression on me.