Egg Moves cannot be relearned if the player chooses to forget them. Although Eggs are no longer present from Gates to Infinity onwards, Pokémon Super Mystery Dungeon and Rescue Team DX return to giving an Egg Move to certain starter Pokémon species.

Can egg moves be relearned sword?

If your Pokemon has any hidden egg moves, or moves that you have formally deleted you can relearn them any time you want.

Can you remember an egg move?

In other words, if a Pokemon is hatched with an egg move but forgets the move later on, the Move Relearner can reteach that egg move.