Use Random.org to randomize your typing, ability, and four moves. I recommend having four pages of the main page open:
>First is out of 2 (for deciding if you're mono or double-typed)
>Second is out of 18 (for types, roll twice if you're dual-typed)
>Third is out of 191 (for abilities. Alternatively, you can add the Gen VII abilities we know of as well for added variety)
>Fourth is out of 621 (for moves)
>Use these pages for a guide on what the numbers for ability and moves indicate, based on index number in-game:
http://bulbapedia.bulbagarden.net/wiki/Ability#List_of_Abilities
http://bulbapedia.bulbagarden.net/wiki/List_of_moves
How overpowered or shitty are you?

Example:
Rock/Fighting
Early Bird
Jump Kick, Smack Down, Fury Cutter, Cotton Guard