Sliggoo is a Dragon-type Pokémon, and is strong against Fire, Water, Grass, and Electric. This makes it great against a lot of the starter and wild Pokémon, but can lead to tough fights against other Dragon-types. If you can raise Sliggoo to Level 49, gain enough experience to almost hit Level 50, and then stop. This will allow you to quickly level it when it rains, which Sliggoo requires to evolve.
X and Y - Routes 8, 10, 14, 15, 16, 19, 21, Shalour, Kiloude, and Couriway. Rain can take a long time to show up, or it could appear immediately. Stay patient and you’ll find yourself in a downpour eventually. Keep Sliggoo in your party but take care of other things. You’ll probably happen across some rain when you least expect it. [2] X Research source Alpha Sapphire and Omega Ruby - It is always raining on Route 120 in the tall grass, making it the perfect place to evolve Sliggoo. Sun, Moon, Ultra Sun and Ultra Moon - It is always raining in Po Town, so this is a great place to evolve Sliggoo in these games. [3] X Research source Rain created by Rain Dance or Drizzle will not cause the evolution. It must be natural rain. [4] X Research source
