Struggle

Deals damage and the user takes ¼ its max HP in recoil. Last resort move.

Struggle deals damage and the user takes 25% of the user's maximum HP as recoil damage.
Struggle is not a regular move and can not be learned. It will only be used if there are no other options available.
Struggle deals type-less damage with no same-type attack bonus
Struggle bypasses accuracy and evasion checks to always hit except when the target is in the semi-invulnerable turn of much such as Dig or Fly.
This is the case if all usually available moves are:

• Out of PP.
• Blocked by other moves such as:
  • Disable
  • Gravity
  • Heal Block
  • Imprison
  • Taunt
  • Throat Chop
  • Torment
• Blocked by Cursed Body
• Blocked by the user's Choice Band , Choice Scarf , Choice Specs or Assault Vest
• The requirements for Belch have not been met and it is the only remaining move.
• The only remaining moves are not available in that game generation (from Gen 7 onwards some moves are completely disabled in that game and may never be used but are still in the game data).

Struggle has a lot of special interactions with other moves, abilities and items as it is a move used as a last resort.

• If the user is forced by Encore to use a move that has no PP remaining, Encore's effect ends. If the move is unavailable for other reasons (such as the ones listed above) it will use Struggle instead.
  Struggle can also not be repeated by Encore.
• Struggle can not be called by Assist, Me First, Metronome or Sleep Talk
• Struggle can not be copied by Mimic, Sketch, Transform or Imposter
• Struggle can not be repeated by Copycat or a held Choice Band , Choice Scarf or Choice Specs
• Struggle can not be forced by Instruct
• Struggle can not be blocked by Disable, Imprison, the ability Cursed Body or be prevented from multiple uses in a row by Torment
• Struggle is not affected by a Normal Gem and does not consume it.
  Even if the Struggle's type is changed by effects such as Electrify or Pixilate, it does not interact with any gem item as it does typeless damage.
• Struggle has no PP and does not interact with any effect that modifies a move's PP such as Grudge or Ether .
  There is an internal maximum value for Struggle's PP but the game never displays that and there is no situation where Struggle can run out of PP.

The specifics of Struggle have changed over the game generations:

• In Gen 1 the user will not take any recoil damage if Struggle breaks a Substitute
  Struggle deals Normal -type damage and is modified by type resistances.
  It also received a STAB bonus if used by Normal -type Pokémon.
  The damage the recoil does is calculated as 50% of the damage that Struggle did to the target.
  In Stadium Struggle can hit Ghost -type Pokémon and will not inflict any recoil damage if the move causes the target to faint.
• In Gen 1-3 Struggle has 100% accuracy and can be copied by Mirror Move
• In Gen 2-3 Struggle's recoil damage is 25% of the damage that Struggle did to the target.
• In Gen 4 Struggle activates the target's held Chilan Berry
  Struggle's power is also not raised by Technician despite being listed as 50 power.