I did a Post Game Challenge: Use a team of Pokemon Lv 55 or under to defeat the Pokemon league. You

I did a Post Game Challenge: Use a team of Pokemon Lv 55 or under to defeat the Pokemon league. You can try it if you want to. 

Rules: 

1. EV/Super training is allowed, Pokemon Amie is not.

2. Battle Style to ‘Set’, like competitive battling.

3. No use of Bag items during battle (So no healing or reviving during battle, but it’s permitted after the battle is over, cuz this isn’t a Nuzlocke).

4. Exp Share to be turned off.

5. No changing held items or movepools between in between battle. If you used up berry or an item like Power Herb, you can only replace the item with the same item you used (e.g. if you used a Sitrus berry in a battle, after the battle you can replace that Sitrus berry with another one). If you can’t replace that item, then the Pokemon shall continue battling without any held items. Keep in mind if you use items like Air Balloons or Power Herb, you’ll need to spend BP buying the items again if you used that item.

I tried using these restrictions, and I still managed to enter the Hall of Fame. I thought the restrictions will make the battle tougher. It did make it harder than usual, but it wasn’t extremely difficult.