[Error] Evolution error

Hello, I'm doing my first Pokémon game and I had an error when my Fartfetch'd evolves into Sirfetch'd when doing 3 critical hits during combat, the message is as follows:

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Pokémon Essentials Esp v16.3
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Excepción: NameError

Mensaje: uninitialized constant PBEvolution::HoldItem

Pokemon_Evolution:986:in `pbEvolutionEvolutionMoves'

Pokemon_Evolution:980:in `pbCheckEvolutionEx'

Pokemon_Evolution:1239:in `each'

Pokemon_Evolution:1239:in `pbCheckEvolutionEx'

Pokemon_Evolution:980:in `pbEvolutionEvolutionMoves'

Evolution_Moves:369:in `pbEvolution'

PField_Field:1053:in `pbEvolutionCheck'

PField_Field:1035:in `each'

PField_Field:1035:in `pbEvolutionCheck'

PField_Field:1173

If anyone can help me thank you very much.

When it comes to evolving a Galarian Farfetch'd, I would create an attribute in the Pokemon class that records the number of critical hits dealt in battle: incrementing by 1 whenever the opponent receives a critical hit; and resetting to 0 when a battle starts. Create a function in the same class that returns true if the attribute is at least 3. Have your evolution method call the function to check the number of critical hits and confirm that the Farfetch'd is the Galarian variant (unless you want the Kantonian variant to evolve to Sirfetch'd).