diff --git a/src/data/biomes.ts b/src/data/biomes.ts
index 3879053b066..d9ea22f50f2 100644
--- a/src/data/biomes.ts
+++ b/src/data/biomes.ts
@@ -35,18 +35,18 @@ interface BiomeDepths {
 export const biomeLinks: BiomeLinks = {
   [Biome.TOWN]: Biome.PLAINS,
   [Biome.PLAINS]: [ Biome.GRASS, Biome.METROPOLIS, Biome.LAKE ],
-  [Biome.GRASS]: [ Biome.TALL_GRASS, [ Biome.CONSTRUCTION_SITE, 2 ] ],
+  [Biome.GRASS]: Biome.TALL_GRASS,
   [Biome.TALL_GRASS]: [ Biome.FOREST, Biome.CAVE ],
-  [Biome.SLUM]: Biome.CONSTRUCTION_SITE,
+  [Biome.SLUM]: [ Biome.CONSTRUCTION_SITE, [ Biome.SWAMP, 2 ] ],
   [Biome.FOREST]: [ Biome.JUNGLE, Biome.MEADOW ],
   [Biome.SEA]: [ Biome.SEABED, Biome.ICE_CAVE ],
   [Biome.SWAMP]: [ Biome.GRAVEYARD, Biome.TALL_GRASS ],
-  [Biome.BEACH]: [ Biome.SEA, [ Biome.ISLAND, 3 ] ],
+  [Biome.BEACH]: [ Biome.SEA, [ Biome.ISLAND, 2 ] ],
   [Biome.LAKE]: [ Biome.BEACH, Biome.SWAMP, Biome.CONSTRUCTION_SITE ],
   [Biome.SEABED]: [ Biome.CAVE, [ Biome.VOLCANO, 3 ] ],
-  [Biome.MOUNTAIN]: [ Biome.VOLCANO, [ Biome.DOJO, 2] [ Biome.WASTELAND, 2 ] ],
+  [Biome.MOUNTAIN]: [ Biome.VOLCANO, [ Biome.WASTELAND, 2 ], [ Biome.SPACE, 3 ] ],
   [Biome.BADLANDS]: [ Biome.DESERT, Biome.MOUNTAIN ],
-  [Biome.CAVE]: [ Biome.BADLANDS, Biome.LAKE ],
+  [Biome.CAVE]: [ Biome.BADLANDS, Biome.LAKE [ Biome.LABORATORY, 2 ] ],
   [Biome.DESERT]: [ Biome.RUINS, [ Biome.CONSTRUCTION_SITE, 2 ] ],
   [Biome.ICE_CAVE]: Biome.SNOWY_FOREST,
   [Biome.MEADOW]: [ Biome.PLAINS, Biome.FAIRY_CAVE ],
@@ -54,17 +54,17 @@ export const biomeLinks: BiomeLinks = {
   [Biome.VOLCANO]: [ Biome.BEACH, [ Biome.ICE_CAVE, 3 ] ],
   [Biome.GRAVEYARD]: Biome.ABYSS,
   [Biome.DOJO]: [ Biome.PLAINS, [ Biome.JUNGLE, 2], [ Biome.TEMPLE, 2 ] ],
-  [Biome.FACTORY]: [ Biome.TALL_GRASS, [ Biome.LABORATORY, 3 ] ],
-  [Biome.RUINS]: [ Biome.FOREST ],
+  [Biome.FACTORY]: [ Biome.PLAINS, [ Biome.LABORATORY, 2 ] ],
+  [Biome.RUINS]: [ Biome.MOUNTAIN, [ Biome.FOREST, 2 ] ],
   [Biome.WASTELAND]: Biome.BADLANDS,
-  [Biome.ABYSS]: [ Biome.CAVE, [ Biome.SPACE, 3 ], [ Biome.WASTELAND, 3 ] ],
+  [Biome.ABYSS]: [ Biome.CAVE, [ Biome.SPACE, 2 ], [ Biome.WASTELAND, 2 ] ],
   [Biome.SPACE]: Biome.RUINS,
   [Biome.CONSTRUCTION_SITE]: [ Biome.POWER_PLANT, [ Biome.DOJO, 2 ] ],
   [Biome.JUNGLE]: [ Biome.TEMPLE ],
   [Biome.FAIRY_CAVE]: [ Biome.ICE_CAVE, [ Biome.SPACE, 2 ] ],
   [Biome.TEMPLE]: [ Biome.DESERT, [ Biome.SWAMP, 2 ], [ Biome.RUINS, 2 ] ],
   [Biome.METROPOLIS]: Biome.SLUM,
-  [Biome.SNOWY_FOREST]: [ Biome.FOREST, Biome.MOUNTAIN, [ Biome.LAKE, 2 ] ],
+  [Biome.SNOWY_FOREST]: [ Biome.FOREST, [ Biome.MOUNTAIN, 2 ], [ Biome.LAKE, 2 ] ],
   [Biome.ISLAND]: Biome.SEA,
   [Biome.LABORATORY]: Biome.CONSTRUCTION_SITE
 };
diff --git a/src/data/pokemon-species.ts b/src/data/pokemon-species.ts
index db601935bfc..17f2de794ae 100644
--- a/src/data/pokemon-species.ts
+++ b/src/data/pokemon-species.ts
@@ -1132,7 +1132,7 @@ export function initSpecies() {
     ),
     new PokemonSpecies(Species.SNORLAX, 1, false, false, false, "Sleeping Pokémon", Type.NORMAL, null, 2.1, 460, Abilities.IMMUNITY, Abilities.THICK_FAT, Abilities.GLUTTONY, 540, 160, 110, 65, 65, 110, 30, 25, 50, 189, GrowthRate.SLOW, 87.5, false, true,
       new PokemonForm("Normal", "", Type.NORMAL, null, 2.1, 460, Abilities.IMMUNITY, Abilities.THICK_FAT, Abilities.GLUTTONY, 540, 160, 110, 65, 65, 110, 30, 25, 50, 189, false, null, true),
-      new PokemonForm("G-Max", SpeciesFormKey.GIGANTAMAX, Type.NORMAL, null, 35, 460, Abilities.THICK_FAT, Abilities.THICK_FAT, Abilities.THICK_FAT, 640, 200, 135, 85, 80, 125, 15, 25, 50, 189),
+      new PokemonForm("G-Max", SpeciesFormKey.GIGANTAMAX, Type.NORMAL, null, 35, 460, Abilities.HARVEST, Abilities.HARVEST, Abilities.HARVEST, 640, 200, 135, 80, 80, 125, 20, 25, 50, 189),
     ),
     new PokemonSpecies(Species.ARTICUNO, 1, true, false, false, "Freeze Pokémon", Type.ICE, Type.FLYING, 1.7, 55.4, Abilities.PRESSURE, Abilities.NONE, Abilities.SNOW_CLOAK, 580, 90, 85, 100, 95, 125, 85, 3, 35, 290, GrowthRate.SLOW, null, false),
     new PokemonSpecies(Species.ZAPDOS, 1, true, false, false, "Electric Pokémon", Type.ELECTRIC, Type.FLYING, 1.6, 52.6, Abilities.PRESSURE, Abilities.NONE, Abilities.STATIC, 580, 90, 90, 85, 125, 90, 100, 3, 35, 290, GrowthRate.SLOW, null, false),
@@ -3573,7 +3573,7 @@ export const starterPassiveAbilities = {
   [Species.CHATOT]: Abilities.PUNK_ROCK,
   [Species.SPIRITOMB]: Abilities.VESSEL_OF_RUIN,
   [Species.GIBLE]: Abilities.SAND_STREAM,
-  [Species.MUNCHLAX]: Abilities.HARVEST,
+  [Species.MUNCHLAX]: Abilities.RIPEN,
   [Species.RIOLU]: Abilities.MINDS_EYE,
   [Species.HIPPOPOTAS]: Abilities.UNAWARE,
   [Species.SKORUPI]: Abilities.SUPER_LUCK,