How to "replace" enemies?

[DXGG]

Hello, i'm fairly new to ZDoom, and so far i only changed a few weapons in my mods, and i'm here to ask for help, since i have no idea how to do this...

Basically, i want to add a new enemy type, like a zombie holding a new weapon for example, i know how to that, but is there anyway i can replace say, a few zombiemen as my new enemy?

Let's say a make an Enemy called "ZombiePlasma", how can i make it so, this enemy replaces ZombieMen in some places they should appear?

Like, in map01, of the two zombiemen that are in front of you when you spawn, one of them is my new enemy.

I have no idea if what i said even makes sense, but well... please help

[Guest]

Use a RandomSpawner. (https://zdoom.org/wiki/Classes:RandomSpawner)
For example:
Actor ZombieReplacer : RandomSpawner 3004
{
DropItem "ZombieMan"
DropItem "ZombiePlasma"
}

While you can check the monster's position and replace them that way, it's way better to just use a RandomSpawner to randomly spawn your new enemy.

[DXGG]

Thank you so much. Guess i should have read through the wiki first