Open monster.sdata, right click on any of the column headers , enable 'show all mobs'.
Then choose one of those level 0 mobs (they're named Error Monster xxxx).
Rename the mob, make it level 1+ and edit all the other required parameters.
Save the sdata, run the query.
What i do is using just the line that inserts that mob so I dont run the whole query for just 1 item.
e.g.
Code:
DELETE FROM [PS_GameDefs].[dbo].[Mobs]
WHERE MobID=3250
GO
INSERT INTO [PS_GameDefs].[dbo].[Mobs] values (3250,'Mob Name',1,.....etc)
GO