Answer 1

In national park top right corner there is a hole in the fence go through and turn left keep going around until you find a poke ball it wil have dig

Answer 2

Ian2227 you can find dig in the national park
and as you go to the kanto region
go to celadon city to the department store
and theyre selling it for 2000 yen

so I hope this helpd you

Answer 3

You can make your pokemon hold it on another version then get someone to trade with you on that version then take the TM from that pokemon then trade back.