Lvl up learnsets by generation (#4049)

* Lvl up learnsets by generation

I think the title sums it up pretty nicely

* Update level_up_learnsets.h

forgot some newer pokemon

* divided the learnset file into generations

* Separated learnsets by generation

Separated the learnsets by generation, added a bit more documentation in the config file

* Update src/pokemon.c

Co-authored-by: Eduardo Quezada D'Ottone <eduardo602002@gmail.com>

* Update include/config/pokemon.h

Co-authored-by: Eduardo Quezada D'Ottone <eduardo602002@gmail.com>

---------

Co-authored-by: Eduardo Quezada D'Ottone <eduardo602002@gmail.com>

include/config/pokemon.h

@@ -10,6 +10,14 @@
 #define P_UPDATED_EVS               GEN_LATEST  // Some Pokémon have received EV updates after their introduction.
 #define P_UPDATED_EXP_YIELDS        GEN_LATEST  // Since Gen 5, some Pokémon have received base Experience changes.
 
+// Learnsets
+#define P_LVL_UP_LEARNSETS          GEN_LATEST  // Choose which set of Level Up Learnsets to use.
+                                                // For generations that hadn't introduced a species yet, we use their first appearence (eg. Chikorita's Gen2 data if the config is set to GEN_1).
+                                                // For generations that don't include a previously introduced species, we use their last apperance (eg. Snivy's Gen7 data if the config is set to GEN_8).
+                                                // GEN_1/2/3/4/5/6/7: Yellow, Crystal, RSE, HGSS, B2W2, XY, USUM learnsets respectively.
+                                                // GEN_8: Use the following priority: BDSP for Gen1-4 Pokémon, then LA for species introduced in that game, then SwSh for species present in those games. Otherwise, use GEN_7.
+                                                // GEN_9: SV For species present in those games. Otherwise use GEN_8.
+
 // Evolution settings
 #define P_FRIENDSHIP_EVO_THRESHOLD   GEN_LATEST  // Since Gen 8, Pokémon that evolve by friendship evolve at or above 160 friendship instead of 220.
 

src/pokemon.c

@@ -420,7 +420,27 @@ const s8 gNatureStatTable[NUM_NATURES][NUM_NATURE_STATS] =
 
 #include "data/pokemon/trainer_class_lookups.h"
 #include "data/pokemon/experience_tables.h"
-#include "data/pokemon/level_up_learnsets.h"
+
+#if P_LVL_UP_LEARNSETS >= GEN_9
+#include "data/pokemon/level_up_learnsets/gen_9.h"
+#elif P_LVL_UP_LEARNSETS >= GEN_8
+#include "data/pokemon/level_up_learnsets/gen_8.h"
+#elif P_LVL_UP_LEARNSETS >= GEN_7
+#include "data/pokemon/level_up_learnsets/gen_7.h"
+#elif P_LVL_UP_LEARNSETS >= GEN_6
+#include "data/pokemon/level_up_learnsets/gen_6.h"
+#elif P_LVL_UP_LEARNSETS >= GEN_5
+#include "data/pokemon/level_up_learnsets/gen_5.h"
+#elif P_LVL_UP_LEARNSETS >= GEN_4
+#include "data/pokemon/level_up_learnsets/gen_4.h"
+#elif P_LVL_UP_LEARNSETS >= GEN_3
+#include "data/pokemon/level_up_learnsets/gen_3.h"
+#elif P_LVL_UP_LEARNSETS >= GEN_2
+#include "data/pokemon/level_up_learnsets/gen_2.h"
+#elif P_LVL_UP_LEARNSETS >= GEN_1
+#include "data/pokemon/level_up_learnsets/gen_1.h"
+#endif
+
 #include "data/pokemon/teachable_learnsets.h"
 #include "data/pokemon/form_species_tables.h"
 #include "data/pokemon/form_change_tables.h"