Here's a picture of the "Control Variables" Event screen. Throughout the tutorial, I'll refer to the things and numbers that I'd marked out and highlighted a couple times throughout the tutorial.

You have a level 32 CHAR1. You want to introduce CHAR2 into your party, and CHAR2's level is 1. You want to change CHAR2 to the same level as CHAR1. Here's how we do it:

Action 1: Go to the first page of events. Go to "Control Variables." Set out a variable. Let's call it ACTOR_VAR. Done at (1), and set using operation at (2)

Action 2: Set your ACTOR_VAR to operand actor, which is (4). For the actor, (5), change it to the actor you want to the other to change to.
(So, if we want CHAR2 to be like CHAR1, set it to the actor CHAR1)
Right next to (5) is (6), and set it, (6), to level, which it should already be at actually.

Action 3: Same controlled Variables screen, In Operations, (2), subtract ACTOR_VAR by exactly 1. You'll find out why, and I'm quite sure there are ways around this, but it's the easiest thing I've got in mind at the moment.

Action 4: Go to the 3rd event page, and go to "Change Level." Set actor to the actor's level you want to change to (CHAR2). Set the operation to decrease, and just set it to constant 99.

Action 5: Now, got to the same "Change Level" event again, and then set it to the same actor (CHAR2). Then, instead of the operand constant, we set it to variable ACTOR_VAR. Increase CHAR2's level by ACTOR_VAR.

Congrats! Now, you have a level 32 CHAR2, the same level as Level 32 CHAR1!


Wait a minute, WTF happened? Let's recap now so you can understand what just happened.

For Actions 1-2, we made it so that a variable is the same number as CHAR1's level.
For Actions 3-4, because RMXP's change level event operation has to increase or decrease, we decrease ACTOR_VAR BY 1, and change CHAR2's level TO 1 so we can add a number that would then be the same as CHAR2. Don't worry about the huge 99; decreasing CHAR2's level by 99 would simply bring it to 1.
For Action 5, we then add ACTOR_VAR to CHAR2's current level, resulting in the same level as CHAR1.

Here's a little mathematical example:

1 + (X-1) = X
X is CHAR1's level, courtesy of action 2
1 is CHAR2's initialized level, courtesy of Action 4.
The (X-1) is the ACTOR_VAR minus 1, courtesy of Action 3.
1 + (X-1) is basically courtesy of Action 5, which finishes the whole thing.

For this, you basically had to know the operations of the event screen and basic control variables. Simple enough, and if you actually count the number of clicks, it's barely anything at all.

The title says it all. You want to introduce CHAR 5 to the party, which consists of CHAR1, CHAR2, CHAR3, and CHAR4. You want CHAR5 to be the AVERAGE of the entire party. Basically, once you've learned how to do Tutorial A, B is just repetition crap.

Action 1: Go to the 1st page of events. Go to "Control Variables". Create 5 variables, ACTOR_VAR1, ACTOR_VAR2, ACTOR_VAR3, ACTOR_VAR4, and Party Average

Action 2: Set your ACTOR_VAR1 to operand actor. For the actor, change it to the first party member in your party, found at (6), remember? Set it to level, of course, found at (7).

Action 3: Repeat Action 2 to each of the party members in your party, but using the corresponding ACTOR_VAR#, aka, use ACTOR_VAR1 for CHAR1, ACTOR VAR2 for CHAR2, etc.

Action 4: Go to the "Control Variables" screen once more, and set the variable you want to change to PARTY_AVERAGE. Next, for operations (2), change the operations to add. Next, for Operands (3), set it to Variable, and choose ACTOR_VAR1.

Action 5: Repeat Action 4 to each of the four ACTOR_VAR#. By the end, PARTY_AVERAGE should have the amount of ACTOR_VAR1-4 added up.

Action 6: Divide PARTY_AVERAGE by 4, or the amount of party members you have. THAT'S IT!!! THAT'S THE AVERAGE LEVEL! GUESS WHAT THE H*** WE DO NEXT?!?!?!

Action 7: Subtract PARTY_AVERAGE by exactly 1.

Action 8: Go to the 3rd event page, and go to "Change Level." Set actor to the actor's level you want to change to (CHAR5). Set the operation to decrease, and just set it to constant 99.

Action 9: Now, got to the same "Change Level" event again, and then set it to the same actor (CHAR5). Then, instead of the operand constant, we set it to variable PARTY_AVERAGE. Increase CHAR5's level by PARTY_AVERAGE.


AND.... YOU'RE DONE. Okay, the usual WTF, and now for the explanation:

For Action 1, we created the variables we're about to use. Simple enough.
For Actions 2-3, we set all the ACTOR_VAR# to the respective party members that you currently have.
For Actions 4-5, we added up all of the ACTOR_VAR# into PARTY_AVERAGE. That gives you the amount of ACTOR_VAR# added up, which is used...
For Action 6, where we got the average of the 4 party members added together.
For Actions 7-9, we did the usual familiar thing that we did in Tutorial A. With that, CHAR5 has the average of your party, or at least CHAR1-4.

Now, there's something that pops up when doing all this. What would happen if, at step 6, PARTY_AVERAGE was an odd number, or one not perfectly divisible by 4?
Well, RMXP's program rounds DOWN if the number if it's not an integer. If it's 2.5, the variable would become 2. If it's 2.9999999999999, it rounds down to 2. For any programmer out there, you know exactly what I'm talking about.
So, let's give an example with basic numbers to show why rounding down is the proper choice for this with an example:
1 + 1 + 2 + 1 = 5. 5/4 = 1.25, which rounds down to 1. When we finish up Actions 7-9, it becomes 0, which added to the initialized level of 1, the character would then be level 1. Now, if it had rounded up, the character would be level 2, which, as you clearly see, is not the average. 1.25 is closer to 1 than to 2.
The level that is given from Tutorial B is the average, or as close as it can get considering that "levels" deals purely in integer numbers.

As you can clearly see, Tutorial B is simply Tutorial A extended a little bit. The extra variables were purely made to accommodate the number of CHARs that we are working with. Tutorial B can work with only 2 CHARs and adding CHAR3, resulting in only 3 variables, or 22 CHARs, resulting in 23 variables.

Oh yeah, I should mention at this moment if you really didn't know...
You don't HAVE to introduce a new actor into your party. You can just fiddle around with the actors in your database for whatever your needs are. I'm using the variables names PARTY_AVERAGE and things like that to only easily accommodate you with the ideas of using the variables in this way. I'm pretty sure you already know this, so whatever.