Jumbo Joker slot has a variety of different bonuses and extra spins. Jumbo Joker slot has a variety of different bonuses and extra spins. For instance, the gambler that sees 3 Jokers on the field gets Mystery Prizes. These include bright red berries, watermelons, lemons, grapes. These include bright red berries, watermelons, lemons, grapes. . Show me Bonuses. Jumbo Joker is a double 3-reeled slot with 5 paylines featuring traditional slot machine symbols. These awards. No information is available for this page. Jumbo Joker is a double 3-reeled slot with 5 paylines featuring traditional slot machine symbols. No information is available for this page. These awards. For instance, the gambler that sees 3 Jokers on the field gets Mystery Prizes. A list of the latest no deposit bonus codes updated daily from the popular casinos with regular offers for new and existing casino members.