2.I'm sure if someone absorbs ALL the DRAGON BALLS, shows that he/she is the strongest in DRAGON BALL. Since the anime is named DRAGON BALL and Goku has absorbed all the DRAGON BALLS... therefore, he is the strongest. period.
1 Sites are fan made and ANY POWER-LEVELS AFTER TRUNKS ARE MADE UP.Other than that AT said Kid Gohan was 300 million.
2 Piccalo Damiocuu killed the Dragon rather easily in DB.In DB/Z it weas made clear the DBs couldnt affect someone of greater power[ie most of DBZ].Villians in GT cant blow up planets and Frieza would rear end Shenron or that AU copy of him that forgot Trunks killed him
__________________ Coolness rating-Rakushun>Canti>Taishi>Kenshin>Gohan>The Chainsaw of Natural Selection>All>DB:GT