diff --git a/include/constants/pokemon.h b/include/constants/pokemon.h
index 1d0036b5c46b..210220cd4050 100755
--- a/include/constants/pokemon.h
+++ b/include/constants/pokemon.h
@@ -291,12 +291,16 @@
 #define EVO_ITEM_DAY                      40     // specified item is used on Pokémon, is day
 #define EVO_ITEM_HOLD                     41     // Pokémon levels up, holds specified item
 #define EVO_LEVEL_FOG                     42     // Pokémon reaches the specified level during fog in the overworld
-#define EVO_MOVE_FEMALE                   43     // Pokémon learn specific move, evolves, female (for Basculegion)
-#define EVO_MOVE_MALE                     44     // Pokémon learn specific move, evolves, male   (for Basculegion)
-#define EVO_ITEM_SPECIFIC_MAP             45     // Alolan cross-evolutions (like Alolan Exeggutor)
-#define EVO_LEVEL_SPECIFIC_MAP            46     // Galarian Weezing
-#define EVO_MOVE_SPECIFIC_MAP             47     // Galarian Mr. Mime
-#define EVO_NIGHT_SPECIFIC_MAP            48     // Alolan Marowak
+#define EVO_MOVE_TWO_SEGMENT              43     // Pokémon levels up, knows specified move, has a personality value with a modulus of 0
+#define EVO_MOVE_THREE_SEGMENT            44     // Pokémon levels up, knows specified move, has a personality value with a modulus of 1-9
+#define EVO_LEVEL_FAMILY_OF_THREE         45     // Pokémon reaches the specified level with a personality value with a modulus of 0
+#define EVO_LEVEL_FAMILY_OF_FOUR          46     // Pokémon reaches the specified level with a personality value with a modulus of 1-9
+#define EVO_MOVE_FEMALE                   47     // Pokémon learn specific move, evolves, female (for Basculegion)
+#define EVO_MOVE_MALE                     48     // Pokémon learn specific move, evolves, male   (for Basculegion)
+#define EVO_ITEM_SPECIFIC_MAP             49     // Alolan cross-evolutions (like Alolan Exeggutor)
+#define EVO_LEVEL_SPECIFIC_MAP            50     // Galarian Weezing
+#define EVO_MOVE_SPECIFIC_MAP             51     // Galarian Mr. Mime
+#define EVO_NIGHT_SPECIFIC_MAP            52     // Alolan Marowak
 
 #define EVOS_PER_MON 11
 
diff --git a/src/data/items.h b/src/data/items.h
index a6a1bfa48002..0e2b90f76da7 100755
--- a/src/data/items.h
+++ b/src/data/items.h
@@ -9933,9 +9933,9 @@ const struct Item gItems[] =
         .name = _("Leader's Crest"),
         .price = 3000,
         .description = sLeadersCrestDesc,
-        .pocket = POCKET_ITEMS,
-        .type = ITEM_USE_BAG_MENU,
-        .fieldUseFunc = ItemUseOutOfBattle_CannotUse,
+        .pocket = POCKET_POWER_UP,
+        .type = ITEM_USE_PARTY_MENU,
+        .fieldUseFunc = ItemUseOutOfBattle_EvolutionStone,
     },
 
     [ITEM_MALICIOUS_ARMOR] =
diff --git a/src/data/pokemon/evolution.h b/src/data/pokemon/evolution.h
index 6ddf6c330a56..c754d44d51f8 100755
--- a/src/data/pokemon/evolution.h
+++ b/src/data/pokemon/evolution.h
@@ -36,6 +36,9 @@ const struct Evolution gEvolutionTable[NUM_SPECIES][EVOS_PER_MON] =
     [SPECIES_MEOWTH]                = {{EVO_LEVEL, 28, SPECIES_PERSIAN}},
     [SPECIES_PSYDUCK]               = {{EVO_LEVEL, 33, SPECIES_GOLDUCK}},
     [SPECIES_MANKEY]                = {{EVO_LEVEL, 28, SPECIES_PRIMEAPE}},
+#if P_GEN_9_POKEMON == TRUE
+    [SPECIES_PRIMEAPE]              = {{EVO_MOVE, MOVE_RAGE_FIST, SPECIES_ANNIHILAPE}},
+#endif
     [SPECIES_GROWLITHE]             = {{EVO_ITEM, ITEM_FIRE_STONE, SPECIES_ARCANINE}},
     [SPECIES_GROWLITHE_HISUIAN]     = {{EVO_ITEM, ITEM_FIRE_STONE, SPECIES_ARCANINE_HISUIAN}},
     [SPECIES_POLIWAG]               = {{EVO_LEVEL, 25, SPECIES_POLIWHIRL}},
@@ -150,8 +153,15 @@ const struct Evolution gEvolutionTable[NUM_SPECIES][EVOS_PER_MON] =
 #if P_GEN_4_POKEMON == TRUE
     [SPECIES_MURKROW]               = {{EVO_ITEM, ITEM_DUSK_STONE, SPECIES_HONCHKROW}},
     [SPECIES_MISDREAVUS]            = {{EVO_ITEM, ITEM_DUSK_STONE, SPECIES_MISMAGIUS}},
+#endif
+#if P_GEN_9_POKEMON == TRUE
+    [SPECIES_GIRAFARIG]             = {{EVO_MOVE, MOVE_TWIN_BEAM, SPECIES_FARIGIRAF}},
 #endif
     [SPECIES_PINECO]                = {{EVO_LEVEL, 31, SPECIES_FORRETRESS}},
+#if P_GEN_9_POKEMON == TRUE
+    [SPECIES_DUNSPARCE]             = {{EVO_MOVE_TWO_SEGMENT, MOVE_HYPER_DRILL, SPECIES_DUDUNSPARCE_TWO_SEGMENT},
+                                       {EVO_MOVE_THREE_SEGMENT, MOVE_HYPER_DRILL, SPECIES_DUDUNSPARCE_THREE_SEGMENT}},
+#endif
 #if P_GEN_4_POKEMON == TRUE
     [SPECIES_GLIGAR]                = {{EVO_ITEM_NIGHT, ITEM_RAZOR_FANG, SPECIES_GLISCOR}},
 #endif
@@ -160,6 +170,9 @@ const struct Evolution gEvolutionTable[NUM_SPECIES][EVOS_PER_MON] =
     [SPECIES_SNEASEL]               = {{EVO_ITEM_NIGHT, ITEM_RAZOR_CLAW, SPECIES_WEAVILE}},
 #endif
     [SPECIES_TEDDIURSA]             = {{EVO_LEVEL, 30, SPECIES_URSARING}},
+#if P_GEN_8_POKEMON == TRUE
+    [SPECIES_URSARING]              = {{EVO_ITEM_NIGHT, ITEM_PEAT_BLOCK, SPECIES_URSALUNA}},
+#endif
     [SPECIES_SLUGMA]                = {{EVO_LEVEL, 38, SPECIES_MAGCARGO}},
     [SPECIES_SWINUB]                = {{EVO_LEVEL, 33, SPECIES_PILOSWINE}},
 #if P_GEN_4_POKEMON == TRUE
@@ -170,6 +183,9 @@ const struct Evolution gEvolutionTable[NUM_SPECIES][EVOS_PER_MON] =
     [SPECIES_PHANPY]                = {{EVO_LEVEL, 25, SPECIES_DONPHAN}},
 #if P_GEN_4_POKEMON == TRUE
     [SPECIES_PORYGON2]              = {{EVO_ITEM, ITEM_DUBIOUS_DISC, SPECIES_PORYGON_Z}},
+#endif
+#if P_GEN_9_POKEMON == TRUE
+    [SPECIES_STANTLER]              = {{EVO_MOVE, MOVE_PSYSHIELD_BASH, SPECIES_WYRDEER}},
 #endif
     [SPECIES_TYROGUE]               = {{EVO_LEVEL_ATK_LT_DEF, 20, SPECIES_HITMONCHAN},
                                        {EVO_LEVEL_ATK_GT_DEF, 20, SPECIES_HITMONLEE},
@@ -375,6 +391,9 @@ const struct Evolution gEvolutionTable[NUM_SPECIES][EVOS_PER_MON] =
     [SPECIES_MIENFOO]               = {{EVO_LEVEL, 50, SPECIES_MIENSHAO}},
     [SPECIES_GOLETT]                = {{EVO_LEVEL, 43, SPECIES_GOLURK}},
     [SPECIES_PAWNIARD]              = {{EVO_LEVEL, 52, SPECIES_BISHARP}},
+#if P_GEN_9_POKEMON == TRUE
+    [SPECIES_BISHARP]               = {{EVO_ITEM, ITEM_LEADERS_CREST, SPECIES_KINGAMBIT}},
+#endif
     [SPECIES_RUFFLET]               = {{EVO_LEVEL, 54, SPECIES_BRAVIARY},
                                        {EVO_LEVEL_SPECIFIC_MAP, 54, SPECIES_BRAVIARY_HISUIAN, MAP_FIERY_PATH}}, // hisui
     [SPECIES_VULLABY]               = {{EVO_LEVEL, 54, SPECIES_MANDIBUZZ}},
@@ -520,8 +539,8 @@ const struct Evolution gEvolutionTable[NUM_SPECIES][EVOS_PER_MON] =
     [SPECIES_NYMBLE]                = {{EVO_LEVEL, 24, SPECIES_LOKIX}},
     [SPECIES_PAWMI]                 = {{EVO_LEVEL, 18, SPECIES_PAWMO}},
     [SPECIES_PAWMO]                 = {{EVO_NONE, 0, SPECIES_PAWMOT}},
-    [SPECIES_TANDEMAUS]             = {{EVO_NONE, 0, SPECIES_MAUSHOLD},
-                                       {EVO_NONE, 0, SPECIES_MAUSHOLD_FAMILY_OF_THREE}},
+    [SPECIES_TANDEMAUS]             = {{EVO_LEVEL_FAMILY_OF_FOUR, 25, SPECIES_MAUSHOLD_FAMILY_OF_FOUR},
+                                       {EVO_LEVEL_FAMILY_OF_THREE, 25, SPECIES_MAUSHOLD_FAMILY_OF_THREE}},
     [SPECIES_FIDOUGH]               = {{EVO_LEVEL, 26, SPECIES_DACHSBUN}},
     [SPECIES_SMOLIV]                = {{EVO_LEVEL, 25, SPECIES_DOLLIV}},
     [SPECIES_DOLLIV]                = {{EVO_LEVEL, 35, SPECIES_ARBOLIVA}},
@@ -554,7 +573,7 @@ const struct Evolution gEvolutionTable[NUM_SPECIES][EVOS_PER_MON] =
     [SPECIES_SANDSHREW_ALOLAN]      = {{EVO_ITEM, ITEM_ICE_STONE, SPECIES_SANDSLASH_ALOLAN}},
     [SPECIES_VULPIX_ALOLAN]         = {{EVO_ITEM, ITEM_ICE_STONE, SPECIES_NINETALES_ALOLAN}},
     [SPECIES_DIGLETT_ALOLAN]        = {{EVO_LEVEL, 26, SPECIES_DUGTRIO_ALOLAN}},
-    [SPECIES_MEOWTH_ALOLAN]         = {{EVO_FRIENDSHIP, 28, SPECIES_PERSIAN_ALOLAN}},
+    [SPECIES_MEOWTH_ALOLAN]         = {{EVO_FRIENDSHIP, 0, SPECIES_PERSIAN_ALOLAN}},
     [SPECIES_GEODUDE_ALOLAN]        = {{EVO_LEVEL, 25, SPECIES_GRAVELER_ALOLAN}},
     [SPECIES_GRAVELER_ALOLAN]       = {{EVO_ITEM, ITEM_LINKING_CORD, SPECIES_GOLEM_ALOLAN}},
     [SPECIES_GRIMER_ALOLAN]         = {{EVO_LEVEL, 38, SPECIES_MUK_ALOLAN}},
@@ -608,8 +627,6 @@ const struct Evolution gEvolutionTable[NUM_SPECIES][EVOS_PER_MON] =
     [SPECIES_SINISTEA_ANTIQUE]      = {{EVO_ITEM, ITEM_CHIPPED_POT, SPECIES_POLTEAGEIST_ANTIQUE}},
     [SPECIES_QWILFISH_HISUIAN]      = {{EVO_MOVE, MOVE_BARB_BARRAGE, SPECIES_OVERQWIL}},
     [SPECIES_SNEASEL_HISUIAN]       = {{EVO_ITEM_DAY, ITEM_RAZOR_CLAW, SPECIES_SNEASLER}},
-    [SPECIES_URSARING]              = {{EVO_ITEM_NIGHT, ITEM_PEAT_BLOCK, SPECIES_URSALUNA}},
-    [SPECIES_STANTLER]              = {{EVO_MOVE, MOVE_PSYSHIELD_BASH, SPECIES_WYRDEER}},
     [SPECIES_BASCULIN_WHITE_STRIPED] = {{EVO_MOVE_FEMALE, MOVE_WAVE_CRASH, SPECIES_BASCULEGION_FEMALE},
                                         {EVO_MOVE_MALE, MOVE_WAVE_CRASH, SPECIES_BASCULEGION}},
 #endif
diff --git a/src/data/pokemon/item_effects.h b/src/data/pokemon/item_effects.h
index 30f2f5f4d1eb..d0c16c922b73 100755
--- a/src/data/pokemon/item_effects.h
+++ b/src/data/pokemon/item_effects.h
@@ -626,6 +626,7 @@ const u8 *const gItemEffectTable[ITEMS_COUNT] =
     [ITEM_BLACK_AUGURITE]     = gItemEffect_EvoItem,
     [ITEM_LINKING_CORD]       = gItemEffect_EvoItem,
     [ITEM_PEAT_BLOCK]         = gItemEffect_EvoItem,
+    [ITEM_LEADERS_CREST]      = gItemEffect_EvoItem,
 
     // Berries
     [ITEM_CHERI_BERRY]        = gItemEffect_CheriBerry,
diff --git a/src/pokemon.c b/src/pokemon.c
index e19abfc8117f..36311b4e32a8 100755
--- a/src/pokemon.c
+++ b/src/pokemon.c
@@ -6974,6 +6974,14 @@ u16 GetEvolutionTargetSpecies(struct Pokemon *mon, u8 mode, u16 evolutionItem, s
                 if (gEvolutionTable[species][i].param <= level)
                     targetSpecies = gEvolutionTable[species][i].targetSpecies;
                 break;
+            case EVO_LEVEL_FAMILY_OF_FOUR:
+                if (gEvolutionTable[species][i].param <= level && (personality % 100) != 0)
+                    targetSpecies = gEvolutionTable[species][i].targetSpecies;
+                break;
+            case EVO_LEVEL_FAMILY_OF_THREE:
+                if (gEvolutionTable[species][i].param <= level && (personality % 100) == 0)
+                    targetSpecies = gEvolutionTable[species][i].targetSpecies;
+                break;
             case EVO_BEAUTY:
                 if (gEvolutionTable[species][i].param <= beauty)
                     targetSpecies = gEvolutionTable[species][i].targetSpecies;
@@ -6982,6 +6990,14 @@ u16 GetEvolutionTargetSpecies(struct Pokemon *mon, u8 mode, u16 evolutionItem, s
                 if (MonKnowsMove(mon, gEvolutionTable[species][i].param))
                     targetSpecies = gEvolutionTable[species][i].targetSpecies;
                 break;
+            case EVO_MOVE_TWO_SEGMENT:
+                if (MonKnowsMove(mon, gEvolutionTable[species][i].param) && (personality % 100) != 0)
+                    targetSpecies = gEvolutionTable[species][i].targetSpecies;
+                break;
+            case EVO_MOVE_THREE_SEGMENT:
+                if (MonKnowsMove(mon, gEvolutionTable[species][i].param) && (personality % 100) == 0)
+                    targetSpecies = gEvolutionTable[species][i].targetSpecies;
+                break;
             case EVO_FRIENDSHIP_MOVE_TYPE:
                 if (friendship >= FRIENDSHIP_EVO_THRESHOLD)
                 {