How do you move the truck that the Pokemon mew is under?

Turns out, you can't! Mew isn't under it! Nobody know why it's there.

Answer

You should probably realize that the Mew under the truck is just a rumour and that there is no way to move the truck as much as there is a way to move walls. That rumour has been around for years. A lot of people said you needed to use Strength, others said you needed to complete something. If you really do want to catch a Mew though, I suggest you try an internet search on it. If you find one along the lines of battling trainers near Cerulean City and then teleporting, try that one - it works…but only if you have Pokemon Red, Blue or yellow.

Answer

some people think its in the safari zone but its not so you run away from a snorlax for nothing others think its under the truck and others hack and use cheats me personaly i dont know were it is.