Kingdom Hearts III (PS4) - Marluxia No Damage CM LV1/All Pro Codes Restrictions

Marluxia is an absolute trash boss fight. Not only can Larxene still hurt you if you're not high enough in the air, but Block will fail here a lot. I did discover a small fix for Block fails here. Glide towards the wall as tightly as you can and Block the very first attack that Marluxia does + Counter Kick. I don't know why this makes it to where Block doesn't fail, nor is it a perfect solution, but it does the trick.

Restrictions:

Critical Mode
Level 1
Kingdom Key
No Damage
No Armor
No Accessories
No Magic use from Sora
No Keyblade Upgrades
No Stat Boosters
No Cuisine
Must have all Pro Codes Enabled
Must fight Marluxia with Larxene present
Desperation Move Finish
Keyblade Slam Finish (I don't know the official name for this attack)