do these kind of boards support it?
if so, can we get it enabled?
Yes, I believe MyBB supports it, seeing that the YuGiOh! Card Maker Forum Administrators and Super Mods CAN use it, but ordinary users can't. But only Fang can tell you whether he wants it or not. [/endcaptainobviousspeech]
MyBB's built-in HTML use code is different: it's [HTML], I believe.
[HTML] tag does not work on these forums.
Or, they do not as of yet :)