Upon looking, it appears the level 1 necro pet is linked to id 22 in the pets table. I would say check out your table to see if you have an entry for id 22. If not, you can use:
Code:
Insert into pets values("22","100","100","5","10","60","1","2","0","0","Necro Pet 1");
That'll set it to be in the database and than you can just edit it using your SQL Editor to change hp, dmg, etc.
P.S. If anyone knows where the id's are linked, could ya let me know pls, I would love to setup the 66+ pets but need entries in the pet table.