Hello, So I want to have a Gallade with Thunder Wave. But the TM is post game. But Ralts can breed with several Pokemon who learn Thunder Wave via level up. If I breed both, Will I get a Ralts With Thunder Wave?
Prior to Generation VI, if the father knows any moves that are TMs or HMs in that game (and in Crystal, moves that are taught by a Move Tutor) that the baby is also compatible with, it will inherit the move. If a genderless Pokémon breeds with Ditto, the resultant baby will inherit any compatible TM or HM moves that the genderless non-Ditto Pokémon parent knows.
source So Ralts will hatch knowing thunder wave if its father knew thunder wave when laying the egg.
No sadly. You cannot breed Thunder Wave on Ralts via breeding. You can teach Ralts Thunder Wave through TM in some Gens though. How I know:I looked it up at the move thing for all generations Ralts is in. Hope I helped!!!