Barnak, the 1st Mission Pack did that already with the Horn of Conjouring. It spawns a random monster to follow you. Once it dies it doesn't come back.
In my uber mod I've added it. I could give the mapper the option to pick the monster type and also add info_horn_destinations along with a respawn count.
can this be extracted to make a stand alone mod ?
Link to your uber mod ?
More details, please. Seems to be interesting.
Uber Mod (The Keep Mod)
Not yet released. Plan to do so this week sometime...spotty wifi here where I'm on vacation but hopefully get a good signal day to upload it.
You said that a pet feature would be in your mod ? How will it work ? And would I be able to use a pet monster in any map from my installation ? How ?
Place the Horn of Conjouring as desired.
Player touches horn powerup and horn sound is played.
Random or specific monster spawns as pet.
Pets have glowing effect to indicate friendliness. (I might replace with particle effect.)
Pets follow player and attack other monsters.
Pets are loyal to the point of letting you kill them.
Make it so Voreling can mature into a vore if you can keep them alive
There is also a fiend boss with a shield in one of Kona's old mods, you may want to collect it.