RGB and Black (One of Hitori's strategies)

https://www.youtube.com/watch?v=cmGhOBaY2vg

One of the best cobless strategies out there.

Pros

 * Only problematic zombies are footballs, gigas, and jack-in-the-box zombies
 * Lots of possible sunflower and ice shroom spots
 * Can deal with zombonis and gargantuars with no problem at all
 * Can recover from sun depressions quickly without sunflower strategies
 * Inner lanes can deal with almost anything but Jacks

Cons

 * Cannot deal with jack-in-the-box zombies
 * not at all safe against gigas
 * outer lane fume-shrooms need constant repair
 * only 2 inner row gloom-shrooms
 * no cattails for balloon zombies

Plants to bring

 * Fume-shroom, Gloom-shroom, and Coffee Bean are a MUST
 * Squash
 * Cherry Bomb
 * Lily pad (if there are Jacks)
 * Iceshroom and its Imitator form
 * Blover (if there are balloons)
 * At least 2 buffer plants, although 3 is recommended (this can be fume-shroom and Blover, but will cost a lot of sun)
 * Pumpkin

Modifications

 * Laddering can reduce sun spent and pumpkin maintenance.
 * Firepea or cobs to the upper half can make rounds go by a lot faster.
 * Adding cattails allows Blover to be omitted, but reduces sunflowers.
 * This setup can be "paired" to another setup (e.g. the cobless on the lower half and a cob setup on the upper) to make rounds go by faster or safer.
 * Some pool glooms can be removed for a doom-shroom cycle, although this takes up 2 extra spots, thus either the fumeshroom and gloomshroom are removed or both cherry bomb and squash. This makes Jacks less likely to blow up glooms and contributes about 1.8 DPS to a large portion of the lawn, but inner row DPS is reduced by 8.