How do I make another enemy join a fight when an enemy reaches a certain HP%?

[Sauteed_Onion]

Hi, I'd like to know how to make an enemy join a fight somewhere in the middle of the fight and I'd like to know if it is at all possible to do this without plugins? And if not, which plug in would you recommend, meow?

 

[DamianCastaway]

In the TROOP database, select which enemy you wish to have join the fight and insert them into the scene like you would any other enemy. Right click them and select "appear halfway". Then down below in the events panel, set a conditional event for when your main enemy hits a specific %hp and select the "Enemy Appear..." command on page 3. Then select the enemy you wish to appear!

 

[uglywolf]

Without plugins: Get into Database > Troop

On event section, set the condition from 'don't run' to any of your liking.
On the event command code, go into 'tab 3', navigate 'Battle' and look for 'Enemy Appear'.

You should be able to know what's next.