Once you defeat Crasher Wake, talk to the Galactic Grunt in front of the Great Marsh. He'll run to the eastern exit of Pastoria City. Follow him there and talk to him again. Again, he'll run off but your rival will appear for battle.
Morty's in the Burned Tower with Eusine. You have to battle your rival before he goes back to the Gym though.
it's in canalave city. You have to have a Pokemon that knows surf to get across, and before you can enter the gym, you have to battle your rival
You get their phone # then phone them and they will battle.
After beating the elite four, go to snowpoint city, get on that cool ship with the drills on the front, and you will arive at the fight zone. You imediatly meet up with Your rival and battle the sunnyshore city gym leader along with the elite four's very own flint. you have a tough double battle, at the end of which you meet your rival's father. You talk and then your rival abandons you to go into the fight zone. The battle tower is inside at the back.
The seventh time around, you battle your rival at the Dragon's Den in a double battle with you and your rival against Lance, the Champion, and Clair, the eighth gym leader. View the Related Link for more information.
you must beat the seventh gym leader and then when you walk out you will battle your rival. after you battle your rival you will then be able to find dragonairs in tall grass
In the gym. After you win the league twice, In the Dragon's Den Double battle with your rival against Lance and Clair.
go south of veilstone city into pastoria town then go into the gym make sure your Pokemon are healed because your rival is going to battle you
OK so to challenge the Grunt in Pastoria first Beat the Gym Leader then you'll talk to your rival then talk to him in front of the Croagunk thing, then follow wake and then chase the Galactic Grunt goon then after running after him you'l battle him! Hoped I helped you out!!
The eighth gym leader of Sinnoh, Volkner, returns to battle you again in Platinum after you beat the Elite Four. When you get to battle frontier, you and your rival have a double battle against Volkner and Flint, an Elite Four member.
Now all you need to do is get yourself something called "life".
can u explain what u have done recently, because if u see u rival by the gym u have to battle him, then u get to go inside the gym. and after that u crasher wake and and ur rival go to the great marsh and see a galactic grunt, then u have to follow him