A Perfect Bonus is an additional score bonus that rewards players with 50,000 points if they collect all rings on the map, including Ring Monitors, and finish the level without losing any of them. To get Extra Emblem #4, one must score a perfect bonus on any map (except boss maps). This is easiest on Greenflower Zone Act 1, where 235 Rings have to be collected. To disable the perfect bonus for any stage, NoPerfectBonus must be set to 1 in the Level Header. This is used for boss stages, which would otherwise be too easy for a perfect bonus.