Can anybody find the TFS "Unshelve" option in Visual Studio 2012?

Go to Team Explorer, then "Pending Changes", then "Actions", then "Find Shelvesets", then right click on the shelve you want to unshelve, finally "Unshelve".

Also :

File > Source Control > Find > Find Shelvesets

I always used to right-click on the solution and choose "Unshelve". To add this functionality back:

1. Click on the menu "Tools > Customize". This opens the "Customize" dialog.
2. Select the "Commands" tab.
3. Choose the "Context menu" radio button in the "Choose a menu or toolbar to rearrange" section.
4. Choose "Project and Solution Context Menus | Solution | Source Control" from the drop down.
5. Click the "Add Command" button. This opens the "Add Command" dialog.
6. Choose "File" in the "Categories" list.
7. Choose "TfsUnshelvePendingChanges" in the "Commands" list.
8. Click the "OK" button to close the "Add Command" dialog.
9. Use the "Move Down" button to place the new menu item in the proper place.
10. Click the "Close" button to close the "Customize" dialog.