The bulk update request #8009 is pending approval.

create implication pink_nose_horn (7) -> nose_horn (4438)
create implication orange_nose_horn (9) -> nose_horn (4438)
create implication yellow_nose_horn (35) -> nose_horn (4438)
create implication multicolored_nose_horn (12) -> nose_horn (4438)
create implication brown_nose_horn (53) -> nose_horn (4438)
create implication purple_nose_horn (17) -> nose_horn (4438)
create implication red_nose_horn (17) -> nose_horn (4438)
create implication blue_nose_horn (22) -> nose_horn (4438)
create implication grey_nose_horn (40) -> nose_horn (4438)
create implication white_nose_horn (90) -> nose_horn (4438)
create implication black_nose_horn (141) -> nose_horn (4438)
create implication green_nose_horn (15) -> nose_horn (4438)

Reason: Even though these tags aren't commonly used, I think adding the implications is better.

Shouldn't they also imply [color]_horn too? (or be aliased, if the sentiment is that it's tag bloat)

These seem too specific, I think they would be better off aliased to [color]_horn.