How do you beat Dialga on Pokemon explorers of time?

I know it's a pain, but go back all the way to treasure town(trust me, it's the only way)keep on going on sentry duty if you are able to, because if you do you will be able to get reviver seeds as rewards and if you can't, just get as many reviver seeds as you can by some way and check on the kecleon shop every day to see if they have any in stock. I you or your partner can learn dig then teach it to them! This will be sure to make you win. When you have got at least 7 reviver seeds go back to temporal tower and battle dialga with only dig and you should defeat him!☺(If you are prepared to and want to, go back when you have defeated him and defeat him again so he will join your team!)