Simulate evolution chain when generating movesets

src/data/pokemon-species.ts

@@ -538,6 +538,27 @@ export default class PokemonSpecies extends PokemonSpeciesForm {
     return prevolutionLevels;
   }
 
+  // This could definitely be written better and more accurate to the getSpeciesForLevel logic, but it is only for generating movesets for evolved Pokemon
+  getSimulatedEvolutionChain(currentLevel: integer, forTrainer: boolean = false, isBoss: boolean = false, player: boolean = false) {
+    const ret = [];
+    if (pokemonPrevolutions.hasOwnProperty(this.speciesId)) {
+      const prevolutionLevels = this.getPrevolutionLevels().reverse();
+      const levelDiff = player ? 0 : forTrainer || isBoss ? forTrainer && isBoss ? 2.5 : 5 : 10;
+      ret.push([ prevolutionLevels[0][0], 1 ]);
+      for (let l = 1; l < prevolutionLevels.length; l++) {
+        const evolution = pokemonEvolutions[prevolutionLevels[l - 1][0]].find(e => e.speciesId === prevolutionLevels[l][0]);
+        ret.push([ prevolutionLevels[l][0], Math.min(Math.max(evolution.level + Math.round(Utils.randSeedGauss(0.5, 1 + levelDiff * 0.2) * Math.max(evolution.wildDelay, 0.5) * 5) - 1, 2, evolution.level), currentLevel - 1) ]);
+      }
+      const lastPrevolutionLevel = ret[prevolutionLevels.length - 1][1];
+      const evolution = pokemonEvolutions[prevolutionLevels[prevolutionLevels.length - 1][0]].find(e => e.speciesId === this.speciesId);
+      ret.push([ this.speciesId, Math.min(Math.max(lastPrevolutionLevel + Math.round(Utils.randSeedGauss(0.5, 1 + levelDiff * 0.2) * Math.max(evolution.wildDelay, 0.5) * 5), lastPrevolutionLevel + 1, evolution.level), currentLevel) ]);
+    } else {
+      ret.push([ this.speciesId, 1 ]);
+    }
+
+    return ret;
+  }
+
   getCompatibleFusionSpeciesFilter(): PokemonSpeciesFilter {
     const hasEvolution = pokemonEvolutions.hasOwnProperty(this.speciesId);
     const hasPrevolution = pokemonPrevolutions.hasOwnProperty(this.speciesId);