This yellow missingno is formed by the mew trick but not the slowpoke!!!!!!!! So go through the mew trick but don't go to Water gym's town go to lavaneder town. Head south: go through the pit stop buliding, (you have to have beten the first fisherman) walk past the first fisherman and make sure that the 2nd fisherman battles you by walking up! So once again fly to Lavender town and finish the mew trick. The screen will go black and the music will go...... after a while you get to see it! But remember to if you don't get to battle it do the trick over again!
If you use a ditto you will see the back! It will have only 2 attacks at first but then through the battle it will gain attacks! if you manage to catch it, you will find: thousands of Ash's walking around and loads of pokéballs poping up everywhere. so what everyou do....DON'T SAVE!!!!!!!!!! or if you do save you game will be glitchy for ever and your memory will be DISTROYED!!!;000;
If you use a ditto you will see the back! It will have only 2 attacks at first but then through the battle it will gain attacks! if you manage to catch it, you will find: thousands of Ash's walking around and loads of pokéballs poping up everywhere. so what everyou do....DON'T SAVE!!!!!!!!!! or if you do save you game will be glitchy for ever and your memory will be DISTROYED!!!;000;