Biggest Dragon Ball plot holes?
Off the top of my head, Roshi barely matching an early Goku, and yet somehow performing near Goku's level at a later tournament after he had several upgrades stands out..
You'd think Tao Pie Pie would crush Roshi as easily as he did Goku, but Roshi's fight with Tenshinhan says differently (Even if he was losing, it wasn't the stomp Goku vs Tao was..)