I'm having a slightly hard time understanding what he is saying o.0...Sentence structure is all over the place xD.
Anyways, not very many handheld things can play flash very well anyways...so of course the DS can't play flash games o.0...Considering everything, the DS isn't all that weak, I mean it is the first shot of having a dual screen (not like its going to be perfect the first couple rounds through).
And to answer your question, yes there is a way to view gifs on the DS. Is it a great way to view gifs on the DS? Hell if I know, I don't look at gif images all that much (hell I don't look at image files that much period, manga is a different story of course xD). If anything, I would say it can show gif files decently, not computer speed, but w/e.
DSOrganize will play back .gif animations, though rather slowly most of the time (depends on the resolution of the image). Last time I tried Moonshell, it would only load the last frame, but this was ages ago back with 1.71. Animation support might be in 2.x
Oh...but I thought you could view the images taken by the DSi regardless of whether they were from a certain person's DSi or not. I do recall something about the ability to move the images to the computer, and the inability to move images from a computer onto a DSi (or something like that). That is kind of depressing how Nintendo thought that part through (maybe they were too lazy to get the permissions for the different formats?).