Early Game:
* Route 120: This is a great spot to find Poliwhirl and Wailmer, both of which evolve into strong Water-type Pokemon.
* Route 119: You'll find Psyduck and Goldeen here, which are both good early game options.
* Route 121: You have a chance to encounter Wingull and Spheal in this area.
Mid-Game:
* Route 124: The water here is home to Luvdisc and Mantine, both of which can be valuable additions to your team.
* Route 125: This is a good spot to find Corsola, a unique Water/Rock Pokemon.
* Route 126: Keep an eye out for Sharpedo, a powerful Water/Dark Pokemon that can really pack a punch.
Late Game:
* Seafloor Cavern: This underwater location is where you'll find Kingdra, a legendary pseudo-legendary Water/Dragon Pokemon.
* Sootopolis City: This is a key location for the game's storyline, and you'll find Lombre, a Water/Grass Pokemon, and Lanturn, a Water/Electric Pokemon.
Tips for Catching Water Pokemon:
* Use a Water-type Poke Ball: These Poke Balls have a higher catch rate for Water Pokemon, making it easier to catch them.
* Use False Swipe: This move will lower the target's HP to 1 without causing any damage, making it easier to catch.
* Use Thunder Wave: This move can paralyze the target, giving you more time to throw Poke Balls.
* Use Ultra Balls or Master Balls: These are the best Poke Balls for catching rare or powerful Pokemon.
Remember: The location of Pokemon in Pokemon Emerald is randomized, so you may not find every Pokemon listed in the exact places mentioned above.
Happy catching!