Difficulty: 7/10 - Quite complicated and time consuming.
Required knowlege of: Variables, Common events, skills, troops, Conditional Branches
Engine made for: RMXP
Other engines: Most likely works with other Rpg makers with some adjustments.
Switches needed: 1 switch
Variables needed: An absolute minimum of 6 with 3 variables added for each tame-able creature.
Common Events: Two main common events for the taming skill.
Materials: None needed other than charsets and battlers for your monsters. (RMXP has these).
Actors: You will need to create an actor for each tame-able monster.
Weapons: You will need to create a weapon for each monster too otherwise they will do 0 damage.

1. The first thing you are going to need to do is create the skill that will allow you to tame monsters. So go ahead and configure it however you want. Its important that it does not do any damage because it could potentially mess up the system if it kills the monster.
It is also important that the scope is set to "one enemy"


2. You will now need to create a common event for this skill, just call it something like "taming" and leave it blank for now. Leave the trigger setting as "none". Create another common event called "No taming" and set its trigger to parallel and assign it a junk switch, this switch will need to be turned on at the beginning of your game! Now go back to the taming skill you created and set it to activate the "taming" common event you just created.

3. Go back to the skill menu and create another skill, this skill will cause the death of the enemy that you successfully tame so that it is not still fighting you after it joins your party otherwise this would happen:

See the problem? The monster added to the party seemingly came out of nowhere and the enemy is still there. Meaning there is now an extra slime.
That is why this skill is needed.

When configuring the skill you can make it one of two ways. You can either make it do 9999 damage or make it inflict the knockout state. Either way is fine but the knockout state one is less reliable because it misses and messes things up.
You also need to set the scope to "one enemy" and the Occasion to "never" (So the skill is only used after a successful tame.)
Make sure that the character you want to have the tame skill also knows this skill!

4. The final part of the set up is to create two actors for each monster that you want to be able to tame (One for male and one for female)
It is best to lock all of their equipment, its a bit odd for a slime to be able to equip mythril armor right?
They will also require a weapon otherwise they will do no damage. Just create something generic such as "Claws" and set it to be fixed so it cannot be unequipped.
For the sake of this tutorial it will be based on taming a slime.
For example:


Now onto step 2...

1. Now that you have the base things set up its time to move onto the bulk of the system, the common event. Go back to the "taming" common event you created earlier we will now begin making that.

First of all you will need to create 6 variables.
Partysize - Checks the size of your party to make sure you have enough room to tame a creature.
creaturegender - Determines the gender of the tamed creature.
tamechance - Determines the chance of a successful tame.
slime - Checks what creature you are battling against. (To make sure that the correct one is tamed)
slimef got - Checks if you already have a female slime.
slimem got - Checks if you already have a male slime.

This is enough variables for one tameable creature (Male and Female) and to add more you simply need to add 1 more of the last 3 variables for each creature.

2. Now that you have created the required variables you can begin adding to the system.
In your taming common event add some generic text about the taming attempt e.g: "You attempt to tame the creature..."

You then need to set the variable Partysize to the size of the party by using the set variable command, the party size option is under "Other"

When you have done this, create a conditional branch if partysize < 4
For the "else" branch (this is if the party is full) just put some generic text. eg: "The party is full!"

For the party size being less than 4 branch we can continue the system.

Create another conditional branch, this time checking if the variable Slime is equal to 1.
Leave the "else" branch blank and continue the system in the equal to 1 branch.

Now you need to set the variable creaturegender to a random number between 0 and 11 using the set variable command and the random number option.

After this create another conditional branch if creaturegender <=5
Leave the "else" branch blank for now and continue the system on the <=5 branch.

Now add the text " The Slime you are trying to tame is female." To notify the player what gender the creature is.

Below this add another conditional branch that checks if the variable slimefgot = 0
On the "else" branch put the text "You already have a female slime!"

On the slimefgot = 0 branch put a set variable command. This time setting the variable tamechance to a random number between 0 and 10.

After this put another conditional branch if tamechance <= 4
On the "else" branch you need to put the result of an unsuccessful tame attempt, just some text saying the attempt failed is fine.

On the tamechance <= 4 branch you need to put a message saying the result.


Below this use the "force action" command to force the actor to use the knockout skill that you created, on the "last target"
Then put the "add party member Slime F" command to add the tamed creature to the party.
Below this set the variable slimefgot to 1.

That is the female slime completed, to enable taming of a male slime just copy and paste everything you have done, starting from "the slime you are trying to tame is female" and ending at "setting the variable slimefgot to 1" and just change the variables and text to the male versions.

3. The last few things you need to do are:

Set the common event "No taming" to set the variable Slime to 0 (after every tame-able creature you add, add its variable to this common event)

Go to the troop menu and set the tame-able creature to set its respective variable, in this case Slime to 1 on the first turn.

You will also need to do this for each extra tame-able creature with their individual variables.