There are currently 8 different PokePacks and PokeBoxes. 
When a PokePack is opened, your party is filled with 5 Pixelmon specific to the pack, each pack contains a variety of different Pixelmon.
When a PokeBox is opened, you receive 12 of the associated PokePacks! That's 60 Pokemon!!!

Each Pixelmon you receive will have a Rare chance to be Shiny, Legendary, or both! 
This is a great purchase for anyone looking to receive a little help starting their journey, and also perfect for people who want to get their hands on a strong Legendary or beautiful shiny! Also the community will be very happy with you, because everyone gets what you buy!

PokePacks and PokeBoxes you purchase are distributed to EVERYONE currently online! This way everybody gets a fair shot at obtaining some good teammates.