Continuing this two-parter post, here's the Lucky Star Original Opening, Motteke! Sailor Fuku (もってけ！セーラーふく, Take It! Sailor Uniform). Careful, your eyes/ears may bleed from the hyperactive Japanese cuteness overload:
And here's the corresponding Megaman one, by the same guy I would presume. Jeebus Christ is all I can say...Listen closely to the little bits of fandom in the music..awesome.
And here's a side by side comparison: