Gluttony
Makes the Pokémon eat a held Berry when its HP drops to half or less, which is sooner than usual.
Hustle
Boosts the Attack stat, but lowers accuracy.
It has an incredibly greedy personality. Its nest is filled with so much food gathered by Rattata at its direction, it can't possibly eat it all.
It commands a nest of Rattata. Different nests don't get along, whipping up severe fights over feeding grounds.