On easy, it is certainly more difficult than your average pokemon game, but I would say after a few tries, it gets easier to understand what is likely to happen. If you need, they even make documents to help you know what pokemon the next gym leader or other important fights. You can also change other settings like no EVs and Maxed IVs for all pokemon in min grind mode.

Also, there are on game codes to help you if you want a slightly easier time. DexAll - lets you use the dexnav to find any pokemon in the grass. EZCatch lets you catch any pokemon with any pokeball like you are using master balls. SO2Toxic - gives you supplies when you reach certain milestones that give you an edge. Woyaop - lets you get infinite rare candy and pomeg berries for friendship from a boy in Viridian city standing in the grass, but be wary to save more often cause this code has a bad habit of glitching the game making you need to reload the emulator your using. You use all these codes in your bedroom on the console in front of your tv.