This type of bomb is used by Pop (purple), Tantrum (red), Vincent (green), Howie (blue) and Vega (yellow). The icon looks like this:
Charging Fiend's Power
To charge a Fiend's Special Power, simply collect blocks of that Fiend's corresponding color. You can see the charging progress right below your Fiend when you're drawing the chain:
Using the bomb
Bomb's detonation range can pass through most of the indestructible obstacles in the game. Use it to reach goals hidden behind standard fences or blocks.
All colored Bombs can be moved along the chain of their corresponding color to adjust their position as shown here:
The range of the bomb grows together with your Fiend. Here's how Vertical Bomb's range increases*:
Double Vertical Bomb
This is the second type of vertical bomb in Best Fiends. It's currently used by Thorn (blue). The Double Horizontal Bomb icon looks like this:
Its range will grow in the same fashion as the range of the standard Vertical Bomb. The only difference is that the Double Vertical Bomb will blow up in two columns of the board - one column to the right of the bomb's block and one column to the left as shown here:
* The pictures used in this article show the maximal potential range of the bomb and they don't represent any actual Best Fiends level.