im not all that sure because i didnt beat that yet but you capture all the unknown b4 he finishes digging that cave
At route 214 Which is located in the vicinity (near by area) of Veilstone City /Aashray.Marry NO#1 Pokemon Fan and Champion.
get an known for him
To get Hippopatas you can go to the Ruin Manic cave and then just walk around and there you have a Hippopatas.But Hippopatas are very rare and hate to get wet.
You can find 1 in the ruin manic cave near vielstone. you will really have to look thouht - pokeman
The point of catching all the unknown is that when you have a race with the ruin manic, after you've captured all of them you go back to him and he'll give you TM 28 Dig! Which will help you alot later in the future.
they r in the ruin maniacs cave
Go to rote 214 and go in the cave where there is a ruin manic and u will find a poke ball ht contains dig
You have to let it evolve from a Hippopotas, which you can find at the Ruin Maniac's Cave
The more unknowns you catch, the bigger it gets
dont use action replay cards. they ruin ur ds
It leads to a room with unknown shaped like this ? and !.
You can find TM Dig at the Ruin Maniac Cave.