In Zombot Sharktronic Sub's battle, the player is still given powered Lily Pads in order to plant on aquatic tiles. In addition, the game provides the player Shrinking Violets to aid the player due to the difficulty. On the other hand, the player is not given Tangle Kelps to counter the Zombot's attack, forcing them to have to use Plant Food instead.
Dr. Zomboss: I beseech you, time-zippers, you must listen to reason!
Dr. Zomboss: Coherence crumbles! Our eras become nonsensical!
Dr. Zomboss: Stuff is all jiggy and super whacked-out, like!
He possibly references both Level 5-5 and Bungee Zombie when he says that he hates Imps with a passion, as in the dialogue for Level 5-5, he says that he hates Bungee Zombies with a passion and a vengeance.
Similar to Days 32 and 34, most of the plants the player uses are the plants unlocked in the next world.