Pokemon Soul SIlver Help?

Serebii is a great site that has it all. You get a free dratini after you beat Claire, the 8th gym leader. Scyther can only be caught in the bug catching contest. You can't really get larvitar until much later in the game, unless you trade. Heracross can be found by just headbutting any tree. It would be helpful if you had a Psychic type like Hypo or Alakazm. An yes, you definately should get Mareep because Ampharos is one of the best electric types you can get.