Board Thread:Plants vs. Zombies Wiki discussion/@comment-25546049-20160709215307/@comment-5760976-20160710130542

Nick Archer wrote: If you are the Zombie Hero, the annoying plants are:
 * Brainana
 * It makes the player's brain to zero, thus unable to purchase anything.
 * Doubled Mint
 * Increases the player's losing chance and needed powerful zombies to kill it.

If you are the Plant Hero, the annoying zombies are: Er...that's Shieldcrusher Viking, not Valkyrie. Valkyrie's attack increases with every zombie KO'D.
 * Valkyrie
 * Once it target the player, the Super Block Meter will become empty.
 * Zombot 1000
 * It will kill all the plants and also the poweful ones which increases the opponent's chance to win.