Most sets of this theme were released during its launch in 1995. The following year saw only two new sets. The Royal Knights had also two minor guest appearances in sets of Dark Forest and Fright Knights.
Although the presence of kings has already been implied on earlier occasions, Royal Knights was the first theme that introduced a minifigure portraying a king with a real crown. However, the faction comprised only one single castle (6090 Royal Knight's Castle), which was quite large nonetheless), a fortified bridge (6078 Royal Drawbridge), a small, lonely building (6036 Skeleton Surprise), and a big luxurious carriage (6044 King's Carriage). Apart from a small catapult included in 1843 Space/Castle Value Pack the king didn't own any noteworthy siege engines. They aren't known to have any enemies, but in the poster picture it is showing the Royal King fighting Majisto from Dragon Masters, but the Dragon Masters theme was discontinued one year before the making of the Royal Knights theme, despite two appearing in 1996's Dark forest fortress, and in a picture in a Lego ideas book, the royal knights are clearly seen battling dragon masters. They also are possibly enemies of the Fright Knights as one set includes a Royal Knight soldier as a prisoner and a US Lego Mania Magazine featured a comic strip about the Royal King being taken as a prisoner by Willa the Witch.
The royal coat of arms consisted of a crowned lion head on a red and white background. The same lion head reappeared later on the royal crest of Knight's Kingdom and Castle (2013) which both have a blue background with a yellow cross.
The king's crown was a newly introduced piece, and his long silver sword was new as well.
The skeleton made its debut in three sets of this theme.
|Image||#||Set||Number of pieces||Minifigures||Price||Release|
|1752||Crossbow Boat||21||Royal Knight||1996|
|1804||Crossbow Boat||21||Royal Knight||$2.00||1996|
|1843||Space/Castle Value Pack||104||Royal Knight , Spyrius Astronaut||$8.00||1996|
|2892||Thunder Arrow Boat||17||Royal Knight||1998|
|6008||Royal King||12||Royal King||$3.50||1995|
|6036||Skeleton Surprise||72||Skeleton, Royal Knight Guard||$8.00||1995|
|6044||King's Carriage||124||Royal King + 3 others||$16.50||1995|
|6078||Royal Drawbridge||251||4 (+1 skeleton)||$30.00||1995|
|6090||Royal Knight's Castle||743||11||$95.00||1995|
- Other appearances