Option, effect, roto Hatch, reduces the number of steps required to hatch an egg.
With this equipped, it becomes very easy for you to make them your friends which make them easy to control in battles.
There are different options that you can get access in Roto Loto.
Roto Hatch decreases the number of steps you need in order to hatch an egg.
Raises your Pokemons stats during battle.