I noticed that Mandibuzz can learn roost as both an egg move and a TM move. Since TM moves pass down the same way as egg moves, doesn't that mean that any TM move is automatically and egg move? (unless the Pokemon is 100% male or genderless)
Again, my source is the Pokemondb page, so was there an error?
Prior to Gen V, tms were once-use. Therefore, you could breed them if you had used the tm.