Bulk destroy imported pokemons

Hi,

I've just imported my first csv file exported from CalcyIV... I made a google sheet to do some translations from FR to EN and obviously I have some typos...

Most of the pokemons were imported but I want to erase them all to fix and re-importe them all from CalcyIV...

My question is : is there a way to remove all my pokemons at once?