Heh, for some reason I forgot the classic "SE-GAAAAA". I kept thinking about this X-Men Genesis game where it not only skips the any startup sequence, but the gameplay also starts immediately without a "press start" screen either.
Xmen 2 Clone wars is the game you're thinking of... Love the Megadrive so much.
Fancy hearing me on an amateur podcast with friends gushing over one of my favourite games? https://youtu.be/1I7JfMMxhf8