What happens if I use magic powder in a bug Pokémon and then throw a net ball?

Question

Like the catch rate will be still improved or not

Answer 1

If the wild Pokémon's type has been changed (e.g. due to Soak), the Net Ball checks the Pokémon's current type.

So your answer is
No the Net Ball checks current type, so a Bug Pokemon that became Psychic after Magic Powder would not get boost from the Net Ball.

Bulbapedia

Comments

Oof, misread the question. Should probably stop doing that

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Ok thanks