diff --git a/test/simulator/abilities/pressure.js b/test/simulator/abilities/pressure.js
new file mode 100644
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+++ b/test/simulator/abilities/pressure.js
@@ -0,0 +1,154 @@
+var assert = require('assert');
+var battle;
+
+describe('Pressure', function () {
+	afterEach(function () {
+		battle.destroy();
+	});
+
+	it('should deduct 1 extra PP from opposing Pokemon moves targetting the user', function () {
+		battle = BattleEngine.Battle.construct('battle-pressure-1', 'doublescustomgame');
+		battle.join('p1', 'Guest 1', 1, [
+			{species: "Giratina", ability: 'pressure', moves: ['rest']},
+			{species: "Talonflame", ability: 'galewings', moves: ['peck']}
+		]);
+		battle.join('p2', 'Guest 2', 1, [
+			{species: "Giratina", ability: 'pressure', moves: ['rest']},
+			{species: "Talonflame", ability: 'galewings', moves: ['peck']}
+		]);
+		battle.commitDecisions(); // Team Preview
+		battle.choose('p1', 'move 1, move 1 -1');
+		battle.choose('p2', 'move 1, move 1 1');
+		var move = Tools.getMove('peck');
+		assert.strictEqual(battle.p1.active[1].getMoveData(move).pp, 55);
+		assert.strictEqual(battle.p2.active[1].getMoveData(move).pp, 54);
+	});
+
+	it.skip('should deduct PP if moves are redirected to the user', function () {
+		battle = BattleEngine.Battle.construct('battle-pressure-redirect', 'doublescustomgame');
+		battle.join('p1', 'Guest 1', 1, [
+			{species: "Giratina", ability: 'pressure', moves: ['followme']},
+			{species: "Talonflame", ability: 'galewings', moves: ['peck']}
+		]);
+		battle.join('p2', 'Guest 2', 1, [
+			{species: "Clefable", ability: 'unaware', moves: ['followme']},
+			{species: "Ho-Oh", ability: 'pressure', moves: ['peck']}
+		]);
+		battle.commitDecisions(); // Team Preview
+		battle.choose('p1', 'move 1, move 1 2');
+		battle.choose('p2', 'move 1, move 1 2');
+		var move = Tools.getMove('peck');
+		assert.strictEqual(battle.p1.active[1].getMoveData(move).pp, 55);
+		assert.strictEqual(battle.p2.active[1].getMoveData(move).pp, 54);
+	});
+
+	it('should deduct PP even if the move fails or misses', function () {
+		battle = BattleEngine.Battle.construct();
+		battle.join('p1', 'Guest 1', 1, [{species: "Giratina", ability: 'pressure', item: 'laggingtail', moves: ['mistyterrain', 'shadowforce']}]);
+		battle.join('p2', 'Guest 2', 1, [{species: "Smeargle", ability: 'owntempo', moves: ['doubleedge', 'spore', 'moonblast']}]);
+		battle.commitDecisions();
+		assert.strictEqual(battle.p2.active[0].getMoveData(Tools.getMove('doubleedge')).pp, 22);
+		battle.choose('p1', 'move 2');
+		battle.choose('p2', 'move 2');
+		assert.strictEqual(battle.p2.active[0].getMoveData(Tools.getMove('spore')).pp, 22);
+		battle.choose('p2', 'move 3');
+		battle.commitDecisions();
+		assert.strictEqual(battle.p2.active[0].getMoveData(Tools.getMove('moonblast')).pp, 22);
+	});
+
+	it.skip('should deduct PP for each Pressure Pokemon targetted', function () {
+		battle = BattleEngine.Battle.construct('battle-pressure-multi', 'triplescustomgame');
+		battle.join('p1', 'Guest 1', 1, [
+			{species: "Giratina", ability: 'pressure', moves: ['rest']},
+			{species: "Palkia", ability: 'pressure', moves: ['rest']},
+			{species: "Dialga", ability: 'pressure', moves: ['rest']}
+		]);
+		battle.join('p2', 'Guest 2', 1, [
+			{species: "Kyurem", ability: 'pressure', moves: ['hail']},
+			{species: "Zekrom", ability: 'teravolt', moves: ['spikes']},
+			{species: "Reshiram", ability: 'turboblaze', moves: ['rockslide']}
+		]);
+		battle.commitDecisions(); // Team Preview
+		battle.commitDecisions();
+		assert.strictEqual(battle.p2.active[0].getMoveData(Tools.getMove('hail')).pp, 12);
+		assert.strictEqual(battle.p2.active[1].getMoveData(Tools.getMove('spikes')).pp, 12);
+		assert.strictEqual(battle.p2.active[2].getMoveData(Tools.getMove('rockslide')).pp, 13);
+	});
+});
+
+describe('Pressure (DPPt)', function () {
+	afterEach(function () {
+		battle.destroy();
+	});
+
+	it('should deduct 1 extra PP from any moves targetting the user', function () {
+		battle = BattleEngine.Battle.construct('battle-dpp-pressure', 'gen4doublescustomgame');
+		battle.join('p1', 'Guest 1', 1, [
+			{species: "Giratina", ability: 'pressure', moves: ['rest']},
+			{species: "Aerodactyl", ability: 'quickfeet', moves: ['peck']}
+		]);
+		battle.join('p2', 'Guest 2', 1, [
+			{species: "Giratina", ability: 'pressure', moves: ['rest']},
+			{species: "Aerodactyl", ability: 'quickfeet', moves: ['peck']}
+		]);
+		battle.choose('p1', 'move 1, move 1 -1');
+		battle.choose('p2', 'move 1, move 1 1');
+		var move = Tools.getMove('peck');
+		assert.strictEqual(battle.p1.active[1].getMoveData(move).pp, 54);
+		assert.strictEqual(battle.p2.active[1].getMoveData(move).pp, 54);
+	});
+
+	it.skip('should deduct PP if moves are redirected to the user', function () {
+		battle = BattleEngine.Battle.construct('battle-dpp-pressure-redirect', 'gen4doublescustomgame');
+		battle.join('p1', 'Guest 1', 1, [
+			{species: "Giratina", ability: 'pressure', moves: ['followme']},
+			{species: "Aerodactyl", ability: 'quickfeet', moves: ['peck']}
+		]);
+		battle.join('p2', 'Guest 2', 1, [
+			{species: "Clefable", ability: 'magicguard', moves: ['followme']},
+			{species: "Ho-Oh", ability: 'pressure', moves: ['peck']}
+		]);
+		battle.commitDecisions(); // Team Preview
+		battle.choose('p1', 'move 1, move 1 2');
+		battle.choose('p2', 'move 1, move 1 2');
+		var move = Tools.getMove('peck');
+		assert.strictEqual(battle.p1.active[1].getMoveData(move).pp, 55);
+		assert.strictEqual(battle.p2.active[1].getMoveData(move).pp, 54);
+	});
+
+	it('should deduct PP even if the move fails or misses', function () {
+		battle = BattleEngine.Battle.construct('battle-dpp-pressure-miss', 'gen4customgame');
+		battle.join('p1', 'Guest 1', 1, [{species: "Giratina", ability: 'pressure', item: 'laggingtail', moves: ['shadowforce']}]);
+		battle.join('p2', 'Guest 2', 1, [{species: "Smeargle", ability: 'owntempo', moves: ['doubleedge', 'dragonpulse']}]);
+		battle.commitDecisions();
+		assert.strictEqual(battle.p2.active[0].getMoveData(Tools.getMove('doubleedge')).pp, 22);
+		battle.choose('p2', 'move 2');
+		battle.commitDecisions();
+		assert.strictEqual(battle.p2.active[0].getMoveData(Tools.getMove('dragonpulse')).pp, 14);
+	});
+
+	it.skip('should deduct PP for each Pressure Pokemon targetted', function () {
+		battle = BattleEngine.Battle.construct('battle-dpp-pressure-multi', 'gen4doublescustomgame');
+		battle.join('p1', 'Guest 1', 1, [
+			{species: "Palkia", ability: 'pressure', moves: ['rest']},
+			{species: "Dialga", ability: 'pressure', moves: ['rest']}
+		]);
+		battle.join('p2', 'Guest 2', 1, [
+			{species: "Lugia", ability: 'pressure', moves: ['hail']},
+			{species: "Ho-Oh", ability: 'pressure', moves: ['earthquake']}
+		]);
+		battle.commitDecisions();
+		assert.strictEqual(battle.p2.active[0].getMoveData(Tools.getMove('hail')).pp, 12);
+		assert.strictEqual(battle.p2.active[1].getMoveData(Tools.getMove('earthquake')).pp, 12);
+	});
+
+	it('should not deduct PP from self-targeting moves', function () {
+		battle = BattleEngine.Battle.construct('battle-dpp-pressure-self', 'gen4customgame');
+		battle.join('p1', 'Guest 1', 1, [{species: "Palkia", ability: 'pressure', moves: ['calmmind']}]);
+		battle.join('p2', 'Guest 2', 1, [{species: "Dialga", ability: 'pressure', moves: ['calmmind']}]);
+		battle.commitDecisions();
+		var move = Tools.getMove('calmmind');
+		assert.strictEqual(battle.p1.active[0].getMoveData(move).pp, 31);
+		assert.strictEqual(battle.p1.active[0].getMoveData(move).pp, 31);
+	});
+});