Almost identified everyone (with lots of research).
Only the "-ZX-" one is too much common doesn't give much details as a name so I can't pinpoint what's that exactly, if it's a gacha game or something else.

firechikara said:

Almost identified everyone (with lots of research).
Only the "-ZX-" one is too much common of a name that I can't pinpoint what's that exactly, if it's a gacha game or something else.

I think it refers to z/x, but I don't know the character.

VR-Man said:

I think it refers to z/x, but I don't know the character.

Yep, that's right, I just found it.
It's her:
post #2429178
post #2429194

As for the name, seems she's called Banshee
https://altema.jp/zxcob/chara/92
https://zxtcg.fandom.com/wiki/Wailing_Girl,_Banshee

So from what I understood, "Z/X -Zillions of enemy X-" is the trading card game and "Z/X Code OverBoost", its mobile gacha game version.

List finally completed.

EDIT: Welp, can confirm they all have mobile games so it's a list of gacha games we have here.