I don´t know if it´s usually this way but check out this sales list from japan. I don´t know where it´s from, sorry.
1 PS2 Kingdom Hearts Final mix RPL Square 2002/12/26
2 PS2 Kingdom Hearts Final mix Platinum Limited RPL Square 2002/12/26
3 DC King of Fighters 2001 ACG Pre IMOA 2002/12/26
4 GBA Pokémon Sapphire RPL Nintendo 2002/11/21
5 PS2 Million God TAB Japanese amusement broadcast 2002/12/26
6 GBA Pokémon Ruby RPL Nintendo 2002/11/21
7 GBA Mega Man EXE 3 ACG Capcom 2002/12/06
8 PS2 World soccer winning eleven 6 final evolution SPR KONAMI 2002/12/12
9 GC Mario Party 4 TAB Nintendo 2002/11/08
10 PS2 Unlimited Saga RPL Square 2002/12/19
Isn´t it pretty cool that KOF 2001 sells that well.
1 PS2 Kingdom Hearts Final mix RPL Square 2002/12/26
2 PS2 Kingdom Hearts Final mix Platinum Limited RPL Square 2002/12/26
3 DC King of Fighters 2001 ACG Pre IMOA 2002/12/26
4 GBA Pokémon Sapphire RPL Nintendo 2002/11/21
5 PS2 Million God TAB Japanese amusement broadcast 2002/12/26
6 GBA Pokémon Ruby RPL Nintendo 2002/11/21
7 GBA Mega Man EXE 3 ACG Capcom 2002/12/06
8 PS2 World soccer winning eleven 6 final evolution SPR KONAMI 2002/12/12
9 GC Mario Party 4 TAB Nintendo 2002/11/08
10 PS2 Unlimited Saga RPL Square 2002/12/19
Isn´t it pretty cool that KOF 2001 sells that well.