Red Mage from Final Fantasy 1:

http://pix.pe?E____H4___4ACSJSAKUJEYjk4AARAAA_AAk8gAISAA4_A4...

Mario from... Mario :

http://pix.pe/#http://pix.pe?O_____c7_bbbb2O0jk0222t1Otk2k__...

Mickey Mouse :

http://pix.pe/#http://pix.pe?QX4AJBAISH_____AAAB_JO-2JJAAAIA...

Attempt at something cool. Bonus points if you actually understand what it is.

http://pix.pe/?O____AH_________4_4_H4_____H_________________...

Comments: Would be good if you could somehow define your own color pallette. Obviously you are limited in how much data you can encode in with your available Tweet length... so not sure how plausible that would be. Still kinda fun, just hard to make anything decent out of the available canvas size.