Unstoppable Forsythia and Immovable Okra

Unstoppable Forsythias and Immovable Okras (UFIO) are dual plant systems that are offensive-defensive plants.

Overview
When the player chooses to plant the UFIO's seed packet, they plant the Okra normally. Then the player plants the Forsythia somewhere in front of or behind the okra, while staying in the same row (horizontally).

The Forsythia then starts to quickly charge forward until it hits the Okra. If it hits any zombies on the way, it deals 1.75 damage points to them. Once it hits the Okra, the Forsythia bounces into the air, back to where the Forsythia was planted. Then it will charge again. Note that the larger the distance between the two plants, the lower the rate-of-fire will be.

If the Okra is eaten before the Forsythia, then the seed will charge in its direction off of the screen. In this way, however, the damage done by the Forsythia will be 5 damage points, and it will slightly push back zombies.

If the Forsythia is eaten before the Okra, then it will simply act as a regular wall. This, however, will rarely happen, as zombies usually cannot get a bite off of the Forsythia, however a Gargantuar, Explorer Zombie, or any other insta-killing zombie can produce this effect.

The same results are produced if the player digs up either of the plants. Only the partner dug up first will yield any sun return.

The Immovable Okra is immovable. This means that it cannot be pushed, such as through Mecha Football Zombie or Excavator Zombie.

These plants count as two plants in such Brain Busters.

The area between an Okra and Forsythia cannot be occupied by a different UFIO.

The UFIO are based off of the fruit of the genus Forsythia, and the Abelmoschus esculentus (okra), respectively. Its theme is based off of the Irresistible Force Paradox, which asks what will happen if an unstoppable force meets an immovable object. This is also where the name came from.

Plant Food Ability
Plant Food cannot be used on the Forsythia, but it can be used on the Okra. Doing so increases the Okra's health by +35 ndb, and it boosts the Forsythia's speed, but only on the rebound.

Trivia

 * A Forsythia can actually hit a different Okra than its own, and then attach to it, but only if the Forsythia's Okra was removed.