Thrasherm

Hey, I am kinda stuck in the game right now. I am in Sinnoh,5th badge, and i made my only rock smash pokemon forget rock smash, now there is no way for me to get to Jubilife City. The only other way would be to use rock climb, which i cant use because i dont have to badge for. Can someone give/lend/sell me rock smash or some can teleport me to Jubilife City so i can buy it myself? Thanks in advance.