When you save medicham from wish cave medicham gives you a wish stone. If you lose that you can get it from the 50th floor in wish cave.
You use it to get to Jirachi.
If it is in mystery dungeon it doesnt evolve anyone it just give you a wish
No Pokemon evolve with a wish stone. The wish stone is an item exclusive to Pokemon Mystery Dungeon: Blue Rescue Team/ Red Rescue Team. It is used to make a wish when Jirachi is encountered.
The 50th floor. you can also get it from medicam
If you have already rescued the Medicham from Team Meanies in Wish Cave, you can still find another Wish Stone on floor 50 of Wish Cave.
When you get Wish Cave, and you get all the way through it with the Wish Stone, you will see Jirachi at the end. She will ask you if you want a wish. If you refuse the wish, she will ask to join your rescue team.
A wish stone would be good so you can make a wish. And bring any Pokemon that can be powerful against the type of Pokemon there.
you get through wish cave
Beat Jirachi
you have to get a moon stone
BY ****ING YOUR DS
that's dumb