I'm replaying platinum again out of pure boredom and I wanna teach earthquake to my Garchomp and Gyarados. So, how do I get both of them to have earthquake when there is only one tm? Is it even possible?
Only before post game options. I only wanna use it on the story play thru
You can't teach earthquake to both Garchomp and Gyarados via TM as:
Dig is an alternative, but it isn't better than earthquake. Since it is in-game, I recommend you to use Earthquake on Garchomp, since if any electric type comes, you can safely switch into Garchomp.
Hope this helps :)