Who is the worst sidekick ever?S

Plenty of sidekicks are better than their heroes. There are some sidekicks who just kick so much ass all on their own. But then there are the other kind. Who's the absolute weakest sidekick ever? The one that you wish the hero would just let the bad guy get rid of?

Please include a picture or clip illustrating this dreadful supporting character. And please mention his/her name and why he/she is the worst. Thanks!

Top image: Adric from Doctor Who.