Can anyone send me location of all demon souls I cannot find them
Demon souls are placed instead of gym badges, but you'll have to look for them in different places. Follow the only path u can take, and you'll be able to find them in no time. I'll give u locations editing this answer
1st -- Abandoned city, inside a house with several floors. Go to the top floor and fight a lvl 45 2-round battle (1st round with 6 pkmn, 2nd with one more mon stronger)
2nd -- 373 East branch, death tower. Fight against the ghost that block the floor and grab it (black triangle). U need the silph scope that get it outside the tower, from a girl that ask u for save his grandfather
3rd -- Flooded town, house next to pokemart. Fight against a lvl45 electric team at the 2nd floor
4th -- Route 13 (after the sleeping deadlax). Fight against a coloured egg-like enemy
5th -- Kiibo town, go to hunt zone (safari zone in this game). Go at the end and fight a lvl85 mostly-shadow team
6th -- NO
7th -- Route 14 (next to route 15) . Fight against a coloured egg-like enemy
8th -- NO
6th and 8th medal doesn't exist. If you're planning to play this game, u shouldn't do that. It's really bad balanced (e.g: at the very beginning u can get a full lvl100, most of the elite 5 NPC are far more powerful than the final boss itself, makabre evo isn't either accesible or clear how to make it possible, most leggies like p-kyogre, p-groudon, deoxys, etc are random insted of a fixed type, u may get trapped in certain zones such as the last floor of rocket hideout...) and story... uhm... well, is kinda meh at the end
PS: Sorry for doublepost