SPD-Down is a status effect that can hamper your Speed, hence the ailment's name. It is the opposite of SPD-Up, which increases your Speed. It appears in the Mario & Luigi franchise only. Blue streaks going down or a blue flash with a downward arrow may mark the ailment. Enemies may be hit if ambushed via the hammer, but only in Mario & Luigi: Superstar Saga + Bowser's Minions.