Castle Thunder in The Drillimation Series

Castle Thunder (城雷) is a sound effect heard in The Drillimation Series. It consists of a loud thunderclap during a rainstorm. It was used in films from the 1940s to the 1980s, some Hanna-Barbera cartoons, several video games, as well as some anime such as The Drillimation Series.

In the anime
NOTE: This sound is used often during Team Ankoku mottos, but is also used outside of mottos.

Lucky Star

 * Too Tough, Too Late: Can be heard after Keel reveals himself.

Driller Engine 1 Era

 * Lucky Star 3: Dr. Manhole's Curse: Heard during the title screen in PSG form. Was the first game to use it.

Driller Engine 2 Era

 * Super Lucky Star 4: Heard during the title screen like in the previous installment but now used as a PCM-sampled sound from the anime.
 * Touhou 6: The Embodiment of Scarlet Devil: Heard as ambiance during the fifth stage.
 * Mr. Driller Drill Land: Heard during the second part of the song The Dragon's Feed is the People.

Driller Engine 3 Era

 * Lucky Star: Symphony of the Night: Can be heard during the opening FMV and as ambiance in the first stage.