Continuing after losing a rival battle

So im still new at this and i just finall decided on a rival well i cant seem to figure out how to make it so if you lose he walks away. is that a conditional or if anyone knows a better way to do it please tell me

I believe this is what you're looking for:

https://pokemonessentials.wikia.com/wiki/Forum:Trainer_continue_even_if_loss

The sixth argument of pbTrainerBattle can be set to TRUE to heal the player's party after losing the battle. Since you want him to do something if you lose, you'll have to use a switch (such as the poster explains in that wiki post).

ok i read that page i couldnt find i before but now im having this error pop up when i try to battle the rival
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Pokemon Essentials
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Exception: RuntimeError

Message: Script error within event 13, map 43 (professor hanz):

Exception: NameError

Message: (eval):1:in `pbExecuteScript'uninitialized constant Interpreter::True

***Full script:

pbTrainerBattle(PBTrainers::RIVAL1,"Goku",_I("im a loser"),false,1,True)

Interpreter:243:in `pbExecuteScript'

Interpreter:794:in `eval'

Interpreter:243:in `pbExecuteScript'

Interpreter:794:in `command_111'

Interpreter:320:in `execute_command'

Interpreter:193:in `update'

Interpreter:106:in `loop'

Interpreter:198:in `update'

Scene_Map:103:in `update'

Scene_Map:101:in `loop'



Interpreter:276:in `pbExecuteScript'

Interpreter:794:in `command_111'

Interpreter:320:in `execute_command'

Interpreter:193:in `update'

Interpreter:106:in `loop'

Interpreter:198:in `update'

Scene_Map:103:in `update'

Scene_Map:101:in `loop'

Scene_Map:114:in `update'

Scene_Map:68:in `main'



This exception was logged in

C:\Users\ian\Saved Games/Pokemon Essentials/errorlog.txt.

Press Ctrl+C to copy this message to the clipboard.
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OK
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true, not True

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Pokemon Essentials
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Exception: RuntimeError

Message: Script error within event 13, map 43 (professor hanz):

Exception: TypeError

Message: Section064:783:in `+'false can't be coerced into Fixnum

***Full script:

pbTrainerBattle(PBTrainers::RIVAL1,"Goku",_I("im a loser"),false,1,true)

Interpreter:243:in `pbExecuteScript'

PokeBattle_Pokemon:783:in `calcHP'

PokeBattle_Pokemon:807:in `calcStats'

PokeBattle_Pokemon:804:in `each'

PokeBattle_Pokemon:804:in `calcStats'

PokemonTrainers:82:in `pbLoadTrainer'

PokemonTrainers:46:in `each'

PokemonTrainers:46:in `pbLoadTrainer'

PokemonTrainers:32:in `each'

PokemonTrainers:32:in `pbLoadTrainer'



Interpreter:276:in `pbExecuteScript'

Interpreter:794:in `command_111'

Interpreter:320:in `execute_command'

Interpreter:193:in `update'

Interpreter:106:in `loop'

Interpreter:198:in `update'

Scene_Map:103:in `update'

Scene_Map:101:in `loop'

Scene_Map:114:in `update'

Scene_Map:68:in `main'



This exception was logged in

C:\Users\ian\Saved Games/Pokemon Essentials/errorlog.txt.

Press Ctrl+C to copy this message to the clipboard.
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OK
---------------------------