 
Sumo Slammers is a franchise on Earth that have shoes, video games, card games, and mp3 players.
Cards[]
There are three known colors in the Sumo Slammer cards.
Blue[]
the most common card
Red[]
the middle card, its the second most rare and the second most common
Gold[]
The rarest of all sumo slammer cards. Ben was trying really hard to get this in the episodeWashington B.C. however he still cant get the gold sumo slammer card.