Epic Mickey 2: The Power of Two

After you exit Blot Alley via the projector you will arrive in the Train Tunnels and have a conversation with the broken Conductor. After that you will need to negotiate three rooms known as dioramas which highlight past adventures from the original Epic Mickey. The three rooms have a very easy puzzle to fathom, all of which are clearly explained by Gus so won't be a problem.

Use the transporter pipes to advance to the rooms as you go along and once you solve the fireworks puzzle in the last room the exit door will open. Speak again with the now fixed Conductor and jump over to the projector to exit and your trophy will pop.