Place it at the end of a build-up, right before the entrance shot, then follow the reveal with boss fight music and close the sequence with a short victory sting once the helper has joined the action on screen.
Về âm thanh này
This is Proto Man's whistle from Mega Man 3, a short flute-like melody of a few clear high notes that plays for about fourteen seconds before he appears in a stage. It feels calm, lonely and quietly suspenseful, marking a mysterious ally arriving to help. The motif debuted with Proto Man in Capcom's 1990 NES game Mega Man 3.