Despite the name, Beathoven 2 is not a Pathetique/Beethoven Virus remix.

Century is a remix of END OF THE CENTURY, which is a remix of Beethoven's 9th Symphony
Beathoven 2 is a remix of SPEED OVER BEETHOVEN, which is a remix of Fur Elise
Saint Remix is a remix of THE SAINT GOES MARCHING (HELIX REMIX), also known as SAINT GOES MARCHING (REMIX), which is a remix of When The Saints.
V is a remix of V (for EXTREME) which is a remix of V, which is a remix of Winter from Vivaldi's Four Seasons.

I FORGOT KAKUMEI, Kakumei is a remix of Kakumei, which is a remix of Revolutionary Etude.