|"That's not what happened at all!"
This topic is considered non-canon because it never appeared in the TV series.
The original Thunder Bolt is a long, light gray staff. It appears to have Lightning emitting from the tip, but it is unclear if it is actual electricity or just a blade that is shaped to resemble lightning and charged with electrical power. It is Lord Garmadon's favored weapon, as it enhances his already-formidable Destruction powers. Despite this, it has never appeared in the TV series, being relegated to promotional spots and various playsets.
This weapon wasn’t made for fighting, it was built for smiting. Only one exists, and it’s in the foul hands of its creator, Lord Garmadon. It boosts his Power of Destruction, and makes him happy.[link unavailable]
Golden Thunder Bolt
The Golden Thunder Bolt (also known as the Lightning Bolt Dagger) is an upgraded version of the Thunder Bolt weapon. It appears as a small golden sword or dagger with the same lightning/lightning-shaped blade as the Thunder Bolt.
It has even more power than the original weapon, despite being much smaller, and it would continue to be used as Lord Garmadon's preferred weapon. It eventually came into Lloyd's possession.
LEGO.com description (2011)
Lord Garmadon has made a new and terribly-awesome weapon, the Golden Thunder Bolt. Unlike the non-golden version, this one truly makes him happy... 'cause now, it's got extra smiting power.[link unavailable]
LEGO.com description (2012, renamed the Lightning Bolt Dagger)
Forged of the strongest underworldly steel, hardened and charged by lightning to make it diamond tough and electrifying, allowing you to zap or stab anyone who gets in your way. Lloyd's weapon of choice![link unavailable]
- In Garmadon's CGI images, the gray staff of the regular Thunder Bolt is recolored to gold, while the sides of the color are switched and the blue is replaced with green. There is also more space between the clip and the first inner zigzag.