Conversion changes your Pokémon's type to match the type(s) of its
current enemy.
The Converted Pokémon will adopt all the benefits and weaknesses of the
new type. For example, if your Porygon uses Conversion successfully
against an Exeggutor, it will gain the 50% type-matching bonus when using
Psybeam, and will be weak to Ice attacks
and quad-weak to Bug attacks.
Despite being a Normal type attack, it is effective against
Ghost Pokémon.