Dobby is a minifigure that was created for the Harry Potter theme. The minifigure was first released in the set 4731 Dobby's Release in 2002. In the year 2010, a re-designed minifigure of him was produced for the set 4736 Freeing Dobby.
76421 Dobby the House-Elf, Brickipedia
76396 Hogwarts Moment: Divination Class, Brickipedia
LEGO Harry Potter: Years 1-4 - Brickipedia, the LEGO Wiki
The Joker, Brickipedia
Velma Dinkley Brickipedia+BreezeWiki
4731 Dobby's Release, Brickipedia
Goblin (Harry Potter), Brickipedia
Highland Battler, Brickipedia
Zookeeper, Brickipedia
Tom Riddle - Brickipedia, the LEGO Wiki
Dobby, Brickipedia
Harry Potter and the Chamber of Secrets
Aragog - Brickipedia, the LEGO Wiki
Harry Potter (Minifigure), Brickipedia