Main pulley on my metro moved, how can I get it back into place?

If you force it in or out with a prybar, will it move? If so, I'm afraid that the crankshaft thrust washers may have failed. 120k is a lot of miles for that motor so anything could happen. find a Geo, Suzuki or GM specialist to check it out. If you want to find a specialist, here's a directory link for you: https://repairpal.com/chevrolet-repair-in-franklin-minnesota