Due to the premise of both shows, whenever I hear the name "Monster Allergy" my mind goes straight to "Monster by Mistake" (pic related).
Thus more often than not I've found myself wondering why people like "that weird CGI show about a kid with monster allergy" more than once, kek.

Just in case, it wasn't until last year that I finally saw Monster Allergy. Pretty good, though the monster friends became very tiresome very quickly.