The artist was a pixiv member, but it seems that the user is no longer on the website and the account has (been) deleted/removed all of their works, OR the account is completely dead.

However, it seems according to SauceNAO, the artist's name was 'まつげ' from the info I got.

The title of the art was called '歩くむしポケ百科' according to the information I got.