First of all, I never asked for a sub ref, when I saw DW stepping in I thought he asked you. As for Lightning Ball, the damage is cumulative: 5 A1, 10 A2, 15 A3, and so on. If, say, Camerupt holds it for 3 actions, then passes it to Fidgit who holds it for two actions and then throws it at Raikou, the ball would deal 5+10+15+5+10 = 45 damage. Is it clear now?