Well, this became a hobby of mine about two years ago. We had a sprite-making contest on our rp forum, so I started using Marle from Chrono Trigger sprites and changing her up to look like my charas.

So here we have, from left to right:
Top: Numbuh 1, Lizzie, Numbuh 2, The Tommy, Numbuh 3, Mushi, Numbuh 4, Joey, Numbuh 5, Maurice, Cree, Numbuh 12, and Numbuh 23
Bottom: Numbuh 35, Numbuh 86, Numbuh 171 (Sector R), Chad, Numbuh 362, Numbuh 555 (Sector R), Numbuh 573 (Sector R), Numbuh 666 (Sector R), Numbuh 760 (Sector R), and the Delightful Children from Down the Lane (see edit).

Recall that Sector R is my fansector. If I see more operatives worthy of sprite-ification I shall add them. OoooooR, if you want YOUR operative sprite-ified, message me with a brief description! Woot-woot!

Kids Next Door and characters property of Mr. Warburton and Curious Pictures
Sector R characters property of me.

Edit: As per DeLightfulfreak's request, I added the DCFDTL. They were missing before because... well, I don't remember; it's been a couple years. But they're there now. Rejoice, ye delightful fans. Also, Sector R is dead. They... I dunno... they cannibalized each other. I'll let you go to town with the when, where, why, and how.