1

WWhat are those and how do you defend againsat them?

2

I’ll teach you something useful

Go here: http://shoryuken.com/forum/index.php?forums/super-street-fighter-iv-arcade-edition.10/
Top right is a box with “Search…” written in it
Click on it, there’s a little popup
Type “unblockable” into the search box and tick “Display results as thread” (“Search this forum only” is already ticked)
6th 10th 15th and probably more results tell you what you want to know

This is all assuming you’re talking about SF4AEv2012, as nowhere you specified what game you’re even playing (a pretty good thing to do if you want people to help you, btw!)