As u can see, 

If i see my poke happiness or write command on chat then it shows full happiness but if I link my blastoise on chat then the happiness shows down. 

I hv tried to take mega bracelet through this poke but prof. say that my poke is not fully trained! Why??? 

 

Happiness simply doesnt show on linked pokemon but its still full happiness.

Thats not the problem for the quest though. You get the mega bracelet from the NPC in the vermillion library and not from Oak. Try to talk to that NPC and you should get the mega bracelet to do quests to get mega stones.

Also if by "prof." you meant that NPC I am talking about, you need to get maximum EVs. Maximum EVs is 510, so you are still missing 130 EVs to be fully trained.

Edited September 14, 20205 yr by Norex

Yah got to libarary in Verm there is Man walking talk to him