I was just going through pokemon blue version for a bit of fun and since there isn't much info or examples of the whole evolving pokemon that need evolution stones (such as jigglypuff, clefairy and eevee) without actually using an evolution stone thing I thought I'd make a video. This is actually quite convenient because there's only a limited number of moon stones in the game. Anyways here's what you do. Get the pokemon you want to evolve that normally needs the stone and make sure it's close to leveling up. Then put the following pokemon in the second position of your party. Exeggutor for Moon Stone Onix for Water Stone Growlithe for Thunder Stone Psyduck for Leaf Stone MissingNo. for Fire Stone The MissingNo. is not recommended though seeing as I remember it screwing your graphics up if you use it in battle (correct me if I'm wrong here). But anyways go into a wild pokemon battle sending the pokemon you want to evolve out first. Then switch to the relevant pokemon that was placed in the second position in your party and defeat the opposing pokemon. When your pokemon levels up from defeating the opponent it will evolve as if you'd given it the stone. I tried this on yellow and it didn't work so Nintendo probably sorted it on yellow unless my yellow version was a later version or something. Anyways hope you enjoyed the video and thanks for watching.