How to get Lucario

Recommended: Repels, 1 free slot in your pokemon party.

First of all, go to Canalave City and take the boat to Iron Island. Go in the cave and find a girl in there. She will ask if she can go with you; go with her. Lead her to Basement Floor 1 and there you guys will battle two galatic grunts. After you beat them, go down and she will say thank you and give you a pokemon egg. That egg contains Riolu. To evolve Riolu, raise his happiness (giving proteins, carbos, zinc, etc or give him an Experience Share and don't let him battle, so the exp. that other pokemon get will be shared with him).

PS: HE MUST BE EVOLVED AT DAY TIME!!!

How to get Hitmonchan, Hitmonlee and Hitmontop!

Requirements: National Dex, Pokeradar.

Recommended: Do it at day time and go into shiny patches when possible.

Go to Eterna City and walk east to the very start of route 211. Right there, use your pokeradar until you find a Tyrogue. 

To get Hitmonchan - Give Tyrogue at least 2 irons and get him to level 20.  Defense > attack

To get Hitmonlee - Give Tyrogue at least 2 proteins and get him to level 20.  Attack > defense

To get Hitmontop - Get him to level 20. Attack = Defense