What's the hardest trophy in Dragon Ball Z: Kakarot?

What's the hardest trophy in Dragon Ball Z: Kakarot? According to PSN, it’s Tough Enough with a rarity of 7.8%. This trophy requires you to Complete a Level 10 challenge in the Training Room. This unlocks during the Cell saga inside capsule corporation. Android 21 can modify and upgrade the training room using zeni and materials. For this trophy, Levels 1 to 9 can be skipped. Only level 10 has to be completed. It’s against all 3 Majin Buus who are each level 95. I was only level 86 but because I had plenty of healing items, this fight was easy. Maybe they should’ve limited the amount of items I can use.