claro, tem que aumentar a tabela de rewards tbm.
troque:
local prizes = {
[1] = {{itemid = 2160, count = 50}, {itemid = 13536, count = 20}}} -- Mega bit e Oran Berry
por
local prizes = {
[1] = {{itemid = 2160, count = 50}, {itemid = 13536, count = 20}},
[2] = {{itemid = 2160, count = 50}, {itemid = 13536, count = 20}},
[3] = {{itemid = 2160, count = 50}, {itemid = 13536, count = 20}},
[4] = {{itemid = 2160, count = 50}, {itemid = 13536, count = 20}},
[5] = {{itemid = 2160, count = 50}, {itemid = 13536, count = 20}},
[6] = {{itemid = 2160, count = 50}, {itemid = 13536, count = 20}}
} -- Mega bit e Oran Berry