More Special Evolutions

Weather-based Evolutions: Some Pokémon evolve under specific weather conditions. For example, Sliggoo evolves into Goodra when leveled up during rain in the overworld.

Stat-based Evolutions: Certain Pokémon evolve based on their stats. For example, Tyrogue evolves into Hitmonlee, Hitmonchan, or Hitmontop depending on whether its Attack, Defense, or both are higher at level 20.

Form-based Evolutions: Some Pokémon have different forms that affect evolution. For example, Rockruff evolves into different forms of Lycanroc depending on the time of day and version of the game.

Evolution through Affection: In some games, Pokémon evolve through high levels of affection, a separate mechanic from friendship. Sylveon, for example, evolves from Eevee when it has high affection and knows a Fairy-type move.

Special Battle Conditions: Some Pokémon evolve after participating in specific battle conditions. For example, Galarian Farfetch'd evolves into Sirfetch'd after landing three critical hits in a single battle.

Evolution through Rotational Battles: In Pokémon Sword and Shield, Yamask evolves into Runerigus when it takes at least 49 HP in damage and is brought to a specific location in the Wild Area.

Party-based Evolutions: Certain Pokémon require specific Pokémon in the party to evolve. Mantyke evolves into Mantine when leveled up with a Remoraid in the party.

Leveling with Specific Pokémon: In some cases, Pokémon evolve when leveled up alongside certain species. For example, Crabrawler evolves into Crabominable when leveled up in snowy areas.

Evolution by Shedding: Nincada evolves into Ninjask at level 20, but if the player has an empty slot in their party and a Poké Ball, they also receive a Shedinja.

Evolution through Interaction: Some Pokémon evolve through interaction with specific game features. For example, Milcery evolves into Alcremie when holding a Sweet item and the player spins their character.