Disgaea 7 - Cheat Shop, level 9999 enemies, and 'true' levels
Yes, even if an enemy hits level 9999, increasing the Cheat Shop difficulty still increases their true level. Not only does this (obviously) boost their stats, but it also still increases their EXP drops (which scales more or less linearly with level after the first few hundred levels), as well as their Mana and HL and Class EXP (which scale directly with their true level).
Cheat Shop enemy levels from extra stars, like in Disgaea 5, is:
level = default * (1 + 0.2*stars) + 2*stars
level = stars*(0.2*default + 2) + default
and if it's a Carnage map, the number of stars used isn't the shop stars, but instead
carnageStars = (stars + 1)*100
In non-Carnage Martial 5, these Rifle Demons are level 400; therefore cranking up the difficulty in Carnage Martial 5 leads to the following true levels:
Stars, Displayed level, 'True' level, Class EXP to 5th star
0 stars - 8600 - 8600 - 365872 remaining
1 star - 9999 - 16800 - 277312 remaining
2 stars - 9999 - 25000 - 188752 remaining
3 stars - 9999 - 33200 - 100192 remaining
Stars, Displayed level, 'True' level, Class EXP to 6th star
10 stars - 9999 - 90600 - 28381648 remaining