It's exactly what it sounds like. Just a combination of mods so you don't have to do it yourself. And how would you do it yourself? I honestly don't feel like detailing that right now, but I might in the future.

Backup your dis1_st.exe & SUBDATA.DAT files before installation, especially if they've been altered in any way.

The download's setup to be as easy as possible to install. Just enter the installation folder and drop its Disgaea PC folder's contents into your game directory (e.g.: C:\x\Steam\steamapps\common\Disgaea PC). The other two folders--DulceDeClown's [MOD] Disgaea PC HD Sprites & Netherworld Content Pack (v1.2.10-Easy)--can be completely disregarded unless you're interesting in extra info and screenshots.

• https://mega.nz/file/0FBEECLK#KW15hXv0uV7Cu1wZZJt4wLYvcogCeNWezgcCUJ3DNC4
  
• https://drive.google.com/file/d/1fAtIMjxnyMtmx6PnMPSIRzRrYgBlAMdT/view?usp=share_link
  
• https://www.moddb.com/mods/hd-sprites-netherworld-content-pack/downloads/hd-sprites-netherworld-content-pack-v10

VirusTotal: 0/59[www.virustotal.com]
For those who just want the original download for v1.2.10-Easy, here you go. Those who want the "unholy combination" this guide was made for, skip the below links.

• https://mega.nz/file/AZIzDZYA#mrrWJRfgYasE5ZoC7pmPgRx58iLXfqIFUp3skGl4Vpo
  
• https://drive.google.com/file/d/1uS_4sq0ZacnowaQyUVcQBUNNJgbHXk1H/view?usp=sharing
  
• untested direct download found on Reddit: https://web.archive.org/web/20190508233305/https://c10.patreonusercontent.com/3/eyJhIjoxLCJwIjoxfQ%3D%3D/patreon-media/p/post/16830752/95e189505f854944b0f8c22dd29c7725?token-time=1557532800&token-hash=6KB7CPaNfcBFrhqTkbxyCOo2tsQa1MkiemrmQIa_9Gw%3D
  (1/92)[www.virustotal.com]

VirusTotal: 0/46[www.virustotal.com]


Unless they pertain to my combination process, send 'em to the respective mod/tool creators or hope somebody else spots your question in the comments below. 🤷🏿‍♂️

Krisan Thyme's Disgaea PC: Mod Index (WIP) post is very helpful, but it hasn't been updated since Feb 1, 2019. Below are the things I personally use from it with updated links. Pretty Prinny is the only one I generally recommend for this Guide, but Unofficial Disgaea Tools [UDT] will be needed if you wanna make changes or replicate this.

• Netherworld Content Pack [NCP]. (File Manager basically required)
  
• Unofficial Disgaea Tools [UDT]'s latest version is v0.9.8 alpha per the ProgSys /pg_disatools[github.com] GitHub page: https://www.dropbox.com/scl/fi/b9hr5rtc42rp9x7ggtbvu/Disgaea-Tools-v0.9.8-alpha.zip?rlkey=tsu3fgzowyickizq1fzyqe5m3&dl=0
  
• Pretty Prinny [PP]'s latest release is v 0.5.5 and (for testing) v 0.7.x[github.com]. Here's the Hub post of sorts.

(from Pretty Prinny guide)

This chart is based on comments in the thread and my own experience.
Want to read details on Dexter's? Scroll through pages 5-6, but be aware that most of their links are dead.


(from Dexter's comments)

If you're curious to see the originals, see this Disgaea: Hour of Darkness[www.spriters-resource.com] page for something close enough.

I'mma be real with y'all. I'm not about dat fanservice with D5 Armor Knight[disgaea.jp]'s sprites. The game has 4 angles to view the map from. She's one of the very few units I've noticed to have two idle views. Both being the same shot of her ass. 😐 I'm not 'bout it. Y'all might be fine with it, but I'm not. So it's been removed from this combined mod. 🤷🏿‍♂️ Deal with it.

But why isn't the BRAWLER_FEMALE[www.spriters-resource.com] replaced with the original, you ask? Well, da boobs don't jiggle and the cleavage is barely there.
In comparison, the Zombie[vignette.wikia.nocookie.net] has a booty too, but it's only visible from two angles. They knew what they were doing.

The Netherworld Content Pack has 10 extra sprite (.SH) files that needed to be imported to the HD sprites' ANM00.DAT file. They're Index #'s 00216-00225 (just click the Index column in the Disa PC File Manager to sort them). All 10 were imported one at a time in original order with their respective file name's four digits as the ID when prompted.
The labor's already been done in this combined mod, so this section is purely informative.
Consider this an Asagi crash fix, btw.