How do you make an egg hatch faster in Pokemon ruby?

Here’s the fastest way to hatch any Egg:

1. Keep the Egg in your party at all times (or else it won’t hatch at all).

2. Switch your Acro Bike for a Mach Bike at Rydel’s Cycles in Mauville.

3. Put a Pokémon with the ability Flame Body or Magma Armor on your team to halve the number of steps required to hatch the Egg.

4. Zoom around on your Mach Bike until the Egg hatches.