Crashbug

The Bugmen are a family of four DARK Fiend-type monsters introduced in Generation Force. When the three weaker Bugman cards are assembled in the graveyard, the family's trump card can be special summoned.

Play style
The three level 3 monsters in this family, X, Y, and Z each possess a similar effect; they can all summon another Bugman, so long as a correct Bugman is already on the field when they're normal summoned. Bugman "X" will summon "Z" if "Y" is on the field when it's summoned, "Y" will summon "X" when "Z" is on the field when it is summoned, and "Z" will pull out "Y" if "X" is already on the field when it's summoned.

The trump card of the family, Super Bugman, can Special Summon itself in defense mode by removing X, Y, and Z in your graveyard from play. Not only does Super Bugman have 3000 DEF, the highest of any Level 4 monster, but when it's switched to Attack Position, it's ATK becomes swapped with it's DEF, making it a 3000 ATK monster fast.

These cards benefit greatly from the use of No. 34 Electronic Computer-Beast Tera Byte due to its high defense, as well as its summoning requirements. After playing the three Bugman monsters, they can be used as Exceed Material Monsters, providing a powerful monster as well as fuel for a Super Bugman afterwards.

Trivia

 * Each of the level 3 Bugman monsters have bombs for heads.
 * This Family is similar to that of the "Gadgets", "Piece Golems", "Poker", "Magnet Warriors", and "Reactors"; due to having only 3 members which contribute to the theme's trump card.