Go to /quests and click the Bright Clay Quest to activate it

Talk to the Meowth @ 993 41 898

Turn around and go talk to the Claydol

After talking to the Claydol you then need to travel to Crystal View

Once you arrive at Crystal View Follow the Stairs upwards and head towards the path by the Pokemon Center; proceed all the way up to the very top

When you finally reached the peak, you'll see a set of stairs going down, follow the stairs and then go straight for the trees

@ 153, 93, 478

Speak with the Meowth & Claydol yet again, and after you do you will need to make Claydol feel smart by helping it learn type advantages

The First Battle is against Meowth himself, you should use Rock Smash against him

Second Battle is a Xatu and Ice Beam is Super Effective against it

@ -432, 30, 835

The Next Battle is against a Scizor in Circuit City, so you will have to travel to Circuit City

Flamethrower will be the move you want to use here

@ -395, 25, 621

The last fight is not far, it's on one of the beaches in the city, if you follow the path on your right you will arrive in no time

The Last Battle is against a Magnezone and you actually have multiple options for winning, you could use rock smash or earthquake against it

Once the dialogue finishes you should be granted your rewards because that is the end of the quest