At a very young age, ScoobyDoo had unknowingly digested a large dose of radioactive Kibbles (after extensive testing, it was found that only the Kibbles, not the Bits, were affected) which gave him Super Powers suited for fighting in the Arenas. Aside from his keen accuracy Scooby uses his inate ability for senseless babbling to confuse his opponents. Many victims have claimed to hear an eery "Ruh Roh" just before being blown to smithereens. ScoobyDoo did not tryout for Kablooie!, he was simply picked up at the Pound.