Off the top of my head, the one that pops up in my head a lot is Bomberman’s shrill voice shouting “BY HUDSON!” I love it, I love Bomberman’s dumb voice telling me this game is by Hudson.
The Konami logo always stuck out to me, too. Specifically the 16bit era one, which will always make me think of either Sparkster or Goemon.
Also Konami related, and it seems to just be in The Mystical Ninja Starring Goemon on the N64, but I loved the logo for the Goemon Production Committee right after the Konami logo, and just before the opening theme.