diff --git a/build-tools/build-indexes b/build-tools/build-indexes
index 7b53b7ad2..d342b503c 100755
--- a/build-tools/build-indexes
+++ b/build-tools/build-indexes
@@ -285,11 +285,12 @@ process.stdout.write("Building `data/teambuilder-tables.js`... ");
 	let buf = '// DO NOT EDIT - automatically built with build-tools/build-indexes\n\n';
 
 	// process.stdout.write("\n  ");
-	for (const genIdent of [7, -7.5, -7, 6, -6, 5, 4, 3, 2, 1]) {
+	for (const genIdent of [7, 7.1, -7.5, -7, 6, -6, 5, 4, 3, 2, 1]) {
+		const isLetsGo = (genIdent === 7.1);
 		const isDoubles = (genIdent < 0);
 		const isVGC = (genIdent === -7.5);
 		const genNum = Math.floor(isDoubles ? -genIdent : genIdent);
-		const gen = 'gen' + genNum;
+		const gen = isLetsGo ? 'letsgo' : 'gen' + genNum;
 		// process.stdout.write("" + gen + (isDoubles ? " doubles" : "") + "... ");
 		const pokemon = Object.keys(Tools.data.Pokedex);
 		pokemon.sort();
@@ -301,6 +302,13 @@ process.stdout.write("Building `data/teambuilder-tables.js`... ");
 				if (template.tier === 'CAP' || template.tier === 'CAP NFE' || template.tier === 'CAP LC') {
 					return template.tier;
 				}
+				if (isLetsGo) {
+					let baseTemplate = Tools.mod(gen).getTemplate(template.baseSpecies);
+					let validNum = (baseTemplate.num <= 151 && baseTemplate.num >= 1) || [808, 809].includes(baseTemplate.num);
+					if (!validNum) return 'Illegal';
+					if (template.forme && !['Alola', 'Mega', 'Mega-X', 'Mega-Y', 'Starter'].includes(template.forme)) return 'Illegal';
+					return template.tier;
+				}
 				if (isVGC) {
 					if (template.tier === 'NFE') return 'NFE';
 					if (template.tier === 'LC') return 'NFE';
@@ -342,7 +350,11 @@ process.stdout.write("Building `data/teambuilder-tables.js`... ");
 		const items = [];
 		const formatSlices = {};
 
-		if (isVGC) {
+		if (isLetsGo) {
+			BattleTeambuilderTable['letsgo'] = {};
+			BattleTeambuilderTable['letsgo'].tiers = tiers;
+			BattleTeambuilderTable['letsgo'].formatSlices = formatSlices;
+		} else if (isVGC) {
 			BattleTeambuilderTable[gen + 'vgc'] = {};
 			BattleTeambuilderTable[gen + 'vgc'].tiers = tiers;
 			BattleTeambuilderTable[gen + 'vgc'].formatSlices = formatSlices;
@@ -362,6 +374,9 @@ process.stdout.write("Building `data/teambuilder-tables.js`... ");
 		}
 
 		const tierOrder = (() => {
+			if (isLetsGo) {
+				return ["Uber", "OU", "NFE", "LC"];
+			}
 			if (isVGC) {
 				return ["Mythical", "Restricted Legendary", "Regular", "NFE", "LC"];
 			}
@@ -615,6 +630,17 @@ process.stdout.write("Building `data/teambuilder-tables.js`... ");
 			if (minGen === 1) learnsets[id][moveid] = '12' + learnsets[id][moveid];
 		}
 	}
+	/*
+	 * Commented out until it can be done without mutating main data
+	const LGLearnsets = Tools.mod('letsgo').data.Learnsets;
+	for (const id in LGLearnsets) {
+		const learnset = LGLearnsets[id].learnset;
+		learnsets[id] = {};
+		for (const moveid in learnset) {
+			learnsets[id][moveid] = '7';
+		}
+	}
+	*/
 
 	//
 	// Past gen table
diff --git a/build-tools/build-minidex b/build-tools/build-minidex
index fbef09359..5656100bd 100755
--- a/build-tools/build-minidex
+++ b/build-tools/build-minidex
@@ -35,7 +35,7 @@ function sizeObj(path) {
 		let size = imageSize(path);
 		return {
 			w: size.width,
-			h: size.height
+			h: size.height,
 		};
 	} catch (e) {}
 }
@@ -76,7 +76,6 @@ for (let baseid in Tools.data.Pokedex) {
 				g5buf += `\t${id}:` + JSON.stringify(g5row).replace(/"/g, '') + `,\n`;
 			}
 		}
-
 	}
 }
 
diff --git a/js/client-battle-tooltips.js b/js/client-battle-tooltips.js
index 29315b043..4d2d4736e 100644
--- a/js/client-battle-tooltips.js
+++ b/js/client-battle-tooltips.js
@@ -853,6 +853,11 @@ var BattleTooltips = (function () {
 		var isRandomBattle = tier.indexOf('Random Battle') >= 0 || (tier.indexOf('Random') >= 0 && tier.indexOf('Battle') >= 0 && gen >= 6);
 		var value = iv + ((isRandomBattle && gen >= 3) ? 21 : 63);
 		var nature = (isRandomBattle || gen < 3) ? 1 : 1.1;
+		if (tier.indexOf("Let's Go") >= 0) {
+			var maxStat = Math.floor(Math.floor(Math.floor(Math.floor(2 * baseSpe + iv) * level / 100 + 5) * nature) * 1.1);
+			if (tier.indexOf('No Restrictions') >= 0) return maxStat + 200;
+			return maxStat;
+		}
 		return Math.floor(Math.floor(Math.floor(2 * baseSpe + value) * level / 100 + 5) * nature);
 	};
 
diff --git a/js/client-teambuilder.js b/js/client-teambuilder.js
index cd20a6cc8..e95436f03 100644
--- a/js/client-teambuilder.js
+++ b/js/client-teambuilder.js
@@ -125,7 +125,7 @@
 		update: function () {
 			teams = Storage.teams;
 			if (this.curTeam) {
-				this.ignoreEVLimits = (this.curTeam.gen < 3 || this.curTeam.format === 'gen7balancedhackmons');
+				this.ignoreEVLimits = (this.curTeam.gen < 3 || this.curTeam.format === 'gen7balancedhackmons' || this.curTeam.format.endsWith('norestrictions'));
 				if (this.curSet) {
 					return this.updateSetView();
 				}
@@ -1069,6 +1069,7 @@
 		},
 		renderSet: function (set, i) {
 			var template = Tools.getTemplate(set.species);
+			var isLetsGo = this.curTeam.format.startsWith('gen7letsgo');
 			var buf = '<li value="' + i + '">';
 			if (!set.species) {
 				if (this.deletedSet) {
@@ -1131,8 +1132,9 @@
 			buf += '</div></div>';
 
 			buf += '<div class="setrow">';
+			// if (this.curTeam.gen > 1 && !isLetsGo) buf += '<div class="setcell setcell-item"><label>Item</label><input type="text" name="item" class="textbox chartinput" value="' + BattleLog.escapeHTML(set.item) + '" /></div>';
 			if (this.curTeam.gen > 1) buf += '<div class="setcell setcell-item"><label>Item</label><input type="text" name="item" class="textbox chartinput" value="' + BattleLog.escapeHTML(set.item) + '" /></div>';
-			if (this.curTeam.gen > 2) buf += '<div class="setcell setcell-ability"><label>Ability</label><input type="text" name="ability" class="textbox chartinput" value="' + BattleLog.escapeHTML(set.ability) + '" /></div>';
+			if (this.curTeam.gen > 2 && !isLetsGo) buf += '<div class="setcell setcell-ability"><label>Ability</label><input type="text" name="ability" class="textbox chartinput" value="' + BattleLog.escapeHTML(set.ability) + '" /></div>';
 			buf += '</div></div>';
 
 			// moves
@@ -1144,11 +1146,9 @@
 			buf += '<div class="setcell"><input type="text" name="move4" class="textbox chartinput" value="' + BattleLog.escapeHTML(set.moves[3]) + '" /></div>';
 			buf += '</div>';
 
-			var supportsEVs = !this.curTeam.format.startsWith('gen7letsgo');
-
 			// stats
 			buf += '<div class="setcol setcol-stats"><div class="setrow"><label>Stats</label><button class="textbox setstats" name="stats">';
-			buf += '<span class="statrow statrow-head"><label></label> <span class="statgraph"></span> <em>' + (supportsEVs ? 'EV' : 'AV') + '</em></span>';
+			buf += '<span class="statrow statrow-head"><label></label> <span class="statgraph"></span> <em>' + (!isLetsGo ? 'EV' : 'AV') + '</em></span>';
 			var stats = {};
 			var defaultEV = (this.curTeam.gen > 2 ? 0 : 252);
 			for (var j in BattleStatNames) {
@@ -2095,6 +2095,8 @@
 			var inputName = '';
 			inputName = e.currentTarget.name;
 			var val = Math.abs(parseInt(e.currentTarget.value, 10));
+			var supportsEVs = !this.curTeam.format.startsWith('gen7letsgo');
+			var supportsAVs = !supportsEVs && this.curTeam.format.endsWith('norestrictions');
 			var set = this.curSet;
 			if (!set) return;
 
@@ -2130,12 +2132,13 @@
 				if (set.evs[stat] !== val || natureChange) {
 					set.evs[stat] = val;
 					if (this.ignoreEVLimits) {
-						if (set.evs['hp'] === undefined) set.evs['hp'] = 252;
-						if (set.evs['atk'] === undefined) set.evs['atk'] = 252;
-						if (set.evs['def'] === undefined) set.evs['def'] = 252;
-						if (set.evs['spa'] === undefined) set.evs['spa'] = 252;
-						if (set.evs['spd'] === undefined) set.evs['spd'] = 252;
-						if (set.evs['spe'] === undefined) set.evs['spe'] = 252;
+						var evNum = supportsEVs ? 252 : supportsAVs ? 200 : 0;
+						if (set.evs['hp'] === undefined) set.evs['hp'] = evNum;
+						if (set.evs['atk'] === undefined) set.evs['atk'] = evNum;
+						if (set.evs['def'] === undefined) set.evs['def'] = evNum;
+						if (set.evs['spa'] === undefined) set.evs['spa'] = evNum;
+						if (set.evs['spd'] === undefined) set.evs['spd'] = evNum;
+						if (set.evs['spe'] === undefined) set.evs['spe'] = evNum;
 					}
 					this.setSlider(stat, val);
 					this.updateStatGraph();
@@ -2220,14 +2223,18 @@
 				for (var i in set.evs) {
 					total += (i === stat ? val : set.evs[i]);
 				}
-				if (total > 508 && val - total + 508 >= 0) {
+				var supportsEVs = !this.curTeam.format.startsWith('gen7letsgo');
+				var supportsAVs = !supportsEVs && this.curTeam.format.endsWith('norestrictions');
+				var totalLimit = supportsEVs ? 508 : supportsAVs ? 1200 : 0;
+				var limit = supportsEVs ? 252 : supportsAVs ? 200 : 0;
+				if (total > totalLimit && val - total + totalLimit >= 0) {
 					// don't allow dragging beyond 508 EVs
-					val = val - total + 508;
+					val = val - total + totalLimit;
 
 					// make sure val is a legal value
 					val = +val;
 					if (!val || val <= 0) val = 0;
-					if (val > 252) val = 252;
+					if (val > limit) val = limit;
 				}
 			}
 
@@ -2237,12 +2244,13 @@
 
 			if (!set.evs) set.evs = {};
 			if (this.ignoreEVLimits) {
-				if (set.evs['hp'] === undefined) set.evs['hp'] = 252;
-				if (set.evs['atk'] === undefined) set.evs['atk'] = 252;
-				if (set.evs['def'] === undefined) set.evs['def'] = 252;
-				if (set.evs['spa'] === undefined) set.evs['spa'] = 252;
-				if (set.evs['spd'] === undefined) set.evs['spd'] = 252;
-				if (set.evs['spe'] === undefined) set.evs['spe'] = 252;
+				var evNum = supportsEVs ? 252 : supportsAVs ? 200 : 0;
+				if (set.evs['hp'] === undefined) set.evs['hp'] = evNum;
+				if (set.evs['atk'] === undefined) set.evs['atk'] = evNum;
+				if (set.evs['def'] === undefined) set.evs['def'] = evNum;
+				if (set.evs['spa'] === undefined) set.evs['spa'] = evNum;
+				if (set.evs['spd'] === undefined) set.evs['spd'] = evNum;
+				if (set.evs['spe'] === undefined) set.evs['spe'] = evNum;
 			}
 			set.evs[stat] = val;
 
@@ -3150,7 +3158,6 @@
 			if (supportsAVs) {
 				evs = {hp:200, atk:200, def:200, spa:200, spd:200, spe:200};
 				if (!moveCount['PhysicalAttack']) evs.atk = 0;
-				if (!moveCount['PhysicalAttack']) evs.atk = 0;
 				if (!moveCount['SpecialAttack']) evs.spa = 0;
 				if (hasMove['gyroball'] || hasMove['trickroom']) evs.spe = 0;
 			} else if (!supportsEVs) {
@@ -3311,6 +3318,8 @@
 		// Stat calculator
 
 		getStat: function (stat, set, evOverride, natureOverride) {
+			var supportsEVs = !this.curTeam.format.startsWith('gen7letsgo');
+			var supportsAVs = !supportsEVs && this.curTeam.format.endsWith('norestrictions');
 			if (!set) set = this.curSet;
 			if (!set) return 0;
 
@@ -3341,9 +3350,13 @@
 
 			if (stat === 'hp') {
 				if (baseStat === 1) return 1;
+				if (!supportsEVs) return Math.floor(Math.floor(2 * baseStat + iv + 100) * set.level / 100 + 10) + (supportsAVs ? ev : 0);
 				return Math.floor(Math.floor(2 * baseStat + iv + Math.floor(ev / 4) + 100) * set.level / 100 + 10);
 			}
 			var val = Math.floor(Math.floor(2 * baseStat + iv + Math.floor(ev / 4)) * set.level / 100 + 5);
+			if (!supportsEVs) {
+				val = Math.floor(Math.floor(2 * baseStat + iv) * set.level / 100 + 5);
+			}
 			if (natureOverride) {
 				val *= natureOverride;
 			} else if (BattleNatures[set.nature] && BattleNatures[set.nature].plus === stat) {
@@ -3351,6 +3364,10 @@
 			} else if (BattleNatures[set.nature] && BattleNatures[set.nature].minus === stat) {
 				val *= 0.9;
 			}
+			if (!supportsEVs) {
+				var friendshipValue = Math.floor(((!set.happiness ? 255 : set.happiness > 255 ? 255 : set.happiness) / 255 / 10 + 1) * 100);
+				val = Math.floor(val * friendshipValue / 100) + (supportsAVs ? ev : 0);
+			}
 			return Math.floor(val);
 		},
 
diff --git a/js/search.js b/js/search.js
index b78e418c8..f31ddb5fa 100644
--- a/js/search.js
+++ b/js/search.js
@@ -790,6 +790,8 @@
 		} else if (!format) {
 			this.gen = 7;
 		}
+		var isLetsGo = format.startsWith('letsgo');
+		if (isLetsGo) format = format.slice(6);
 		var requirePentagon = (format === 'battlespotsingles' || format === 'battledoubles' || format.slice(0, 3) === 'vgc');
 		var template;
 		var isBH = (format === 'balancedhackmons' || format === 'bh');
@@ -808,11 +810,13 @@
 			} else if (this.gen === 7 && requirePentagon) {
 				table = table['gen' + this.gen + 'vgc'];
 				isDoublesOrBS = true;
-			} else if (table['gen' + this.gen + 'doubles'] && (format.includes('doubles') || format.includes('vgc') || format.includes('triples') || format.endsWith('lc') || format.endsWith('lcuu'))) {
+			} else if (table['gen' + this.gen + 'doubles'] && (format.includes('doubles') || format.includes('vgc') || format.includes('triples') || format.endsWith('lc') || format.endsWith('lcuu')) && !isLetsGo) {
 				table = table['gen' + this.gen + 'doubles'];
 				isDoublesOrBS = true;
 			} else if (this.gen < 7) {
 				table = table['gen' + this.gen];
+			} else if (isLetsGo) {
+				table = table['letsgo'];
 			}
 
 			if (!table.tierSet) {
@@ -846,6 +850,7 @@
 			else if (format === 'doublesou') tierSet = tierSet.slice(slices.DOU);
 			else if (format === 'doublesuu') tierSet = tierSet.slice(slices.DUU);
 			else if (format === 'doublesnu') tierSet = tierSet.slice(slices.DNU);
+			else if (isLetsGo) tierSet = tierSet.slice(slices.Uber);
 			// else if (isDoublesOrBS) tierSet = tierSet;
 			else if (!isDoublesOrBS) tierSet = tierSet.slice(slices.OU, slices.UU).concat(agTierSet).concat(tierSet.slice(slices.Uber, slices.OU)).concat(tierSet.slice(slices.UU));