I am pretty sure you can't but I've never tried. so if you find it out feel free to add some where. :)
Chat with our AI personalities
No
Using a Water Stone on Feebas will have no effect. To evolve Feebas you need to make it hold a Prism Scale and trade it.
The Pokemon that evolve using a water stone: Eevee Starmie Lombre Poliwhirl, too...
You cannot evolve Seadra using a Water Stone on it. To evolve Seadra into Kingdra you need to trade it while it is holding a Dragon Scale item.
No, you cannot evolve Squirtle with a Water Stone.