Purchasing a MewTwoPack will grant EVERYONE online a pack. When a pack is opened by a player, they will recieve 5 real Pixelmon! You can battle, collect, or trade these Pixelmon, it's up to you.
Each Pixelmon you receive has a decent chance to be Shiny, and if you are lucky Legendary!

The Pixelmon inside of this pack include:
Very Rare:
MewTwo

Rare:
Articuno

Common: 
Bulbasaur, Venusaur, Ivysaur, Weedle, Kakuna, Beedrill, Venonat, Venomoth,
Scyther, Salandit, Salazzle, Tentacool, Tentacruel, Shellder, Cloyster,
Krabby, Kingler, Vaporeon, Articuno, Tynamo, Eelektrik, Eelektross, Gastly,
Haunter, Gengar, MrMime, Jynx, Ralts, Kirlia, Gardevoir, Cubone, Marowak, Hitmonlee,
Rhyhorn, Rhydon, Zubat, Golbat, Grimer, Muk, Koffing, Weezing,
Dratini, Dragonair, Dragonite, Pidgey, Pidgeotto, Pidgeot, Lickitung,
Ditto, Eevee, Porygon, Aerodactyl