LEGO BIONICLE Accessory sets weren't standalone sets in the traditional sense, but rather supplementary products that complemented the main BIONICLE sets and themes. These accessories added depth to the Bionicle universe and allowed fans to customize and interact with their Bionicle figures in unique ways.
2006 LEGO Sets
2006 for LEGO was a year of new themes being introduced and a number of well known themes being retired. LEGO in 2006 introduced and discontinued The Avatar: The Last Airbender, introduced the original Batman theme, Exo-Force, Mindstorms NXT, SpongeBob SquarePants, Remote control Trains and Aqua Raiders. However, the following themes were discontinued; Clikits, Vikings. While LEGO Sports was re-introduced in 2006 with a couple Soccer/Football sets.