Chip Away is an offensive Normal-type move. It is contained within TM88, gifted by the lumberjack upon finding the missing part of a machine in Avocet City.
The attack ignores any changes to the target's stats (i.e. Defense, Special Defense, and Evasion); this includes negative as well as positive changes. Chip Away does not ignore changes to the target as a result of Reflect, abilities such as Sand Veil, or items like Eviolite. It is however still affected by changes to the user's Attack or Accuracy.