Hustle is an ability that raises your Attack by 1.5x but lowers your Physical Attack Accuracy to 80%. It also makes it less probable to encounter high-leveled wild Pokémon (about 50%).

Pokémon

Pokédex	Pokémon	Sprite	Type	Obtained
#019	Rattata			Dream World
#020	Raticate			Dream World
#029	Nidoran♀			Dream World
#030	Nidorina			Dream World
#032	Nidoran♂			Dream World
#033	Nidorino			Dream World
#175	Togepi			Natural
#176	Togetic			Natural
#222	Corsola			Natural
#223	Remoraid			Natural
#225	Delibird			Natural
#415	Combee			Dream World
#468	Togekiss			Natural
#554	Darumaka			Natural
#627	Rufflet			Dream World
#632	Durant			Natural
#633	Deino			Natural
#634	Zweilous			Natural