Normally Riolu can learn Rock Slide but when I tried to teach him through move tutor. the NPC told me Riolu can't.

 

Here's Serebii link if you want to confirm it.

https://www.serebii.net/pokedex-sm/447.shtml

Did you try to use Rock Slide as TM?

Normally Riolu can learn Rock Slide but when I tried to teach him through move tutor. the NPC told me Riolu can't.

[ATTACH type=full" alt="hdh.PNG]116451[/ATTACH]

 

Here's Serebii link if you want to confirm it.

https://www.serebii.net/pokedex-sm/447.shtml

Greetings, @RockzBarik

Sorry for the inconvenience.

Riolu doesnt learn rock slide via Tutor move, he learns Rock slive via TM, you can find this TM in: Goldenrod Mart for the price of 3.000 Pokedollars.

 

Please, do not hesitate in ask if you continue having doubts.

Have a great day,

Nezuko

Greetings, @RockzBarik

Sorry for the inconvenience.

Riolu doesnt learn rock slide via Tutor move, he learns Rock slive via TM, you can find this TM in: Goldenrod Mart for the price of 3.000 Pokedollars.

 

Please, do not hesitate in ask if you continue having doubts.

Have a great day,

Nezuko

 

I can't really try TM because currently I'm confined to Kanto as I have yet to started on Johto.

This is just weird though. Pokemon can learn moves by watching a CD/DVD but not if someone show them how to do it in-person.

Well, guess I have to wait till I complete Johto.

Thanks for reply though (^_^) I really appreciate it.