Thank you, PL1.

I have stvbios and prikura. The stvbios was in the MAME 0.148 folder all this time but I didn't notice it. I only put prikura on the MAME 0.161 folder, so that's why it didn't work. But now I put stvbios there as well and the game worked like a charm.

However, I'm not sure if I have the correct versions of stvbios and prikura. The game still displays as yellow on MAME 0.161. That means the emulation is imperfect, right?
This is what I have inside prikura and stvbios:
mpr19333.2
mpr19334.3
mpr19335.4
mpr19336.5
mpr19337.7
epr-17740.ic8
epr-17740a.ic8
epr-17951a.ic8
epr-17952a.ic8
epr-17953a.ic8
epr-17954a.ic8
epr-19730.ic8
epr-20091.ic8
stv110.bin
stv1061.bin
stvb111t.ic8
stvbios.nv
Am I missing something or is it good to go?