Sun Bombs is a Brain Buster in Plants vs. Zombies 2 unique to the Far Future. In this Brain Buster, sun is replaced with destructive purple sun. If the player taps the sun while it is still purple, it will deal 25 normal damage shots to any zombies and destroy non-defensive plants in a 3x3 area around it, while dealing damage to defensive plants. When the sun falls all the way down, it will turn into normal sun. Sun-producingplants besides Sun Bean, Toadstool, and Gold Bloom cannot be used in these levels. It is played in Far Future - Days 4, 19, and 24. After it touches the ground, it will turn into a normal sun. Like normal sun, it disappears if not collected quickly.
Sun drops from the sky far more often in these levels, and it is up to the player whether they want to collect the sun, or use it as an attack towards the zombies. It is very useful for hordes of zombies that are attacking the plants.
Unlike the normal levels, this is the only Brain Buster where in sun falls more constantly than the original levels and its Endless counterpart.
Sun Bombs seem to glow slightly more than normal sun.
This is the second world-specific Brain Buster that lets the player choose their plants. However, most sun producing plants are not allowed. The first is the Powder Keg from Kongfu World. The third is Dark Alchemy in Dark Ages.