Pokemon TCG Generations LC (Little Cup) is a special version in which you can only get Common Cards from the Booster Packs, this is a Simple challenge that you can do if you prefer.
LC Changes:
Your Starder Deck now contains only Commons!
You can only get Commons from Packs.
SILCOON, CASCOON, HAWLUCHA, MOONSTONE, FULL HEAL, ENERGY RETRIEVAL are considered Uncommon, so they would not appear in the packs.