Blanka is probably my best character in ST and despite him being ranked fairly low, i think he has enough strengths to make up for his weaknesses.
heres an overview of his specials:
rolling attack aka blanka ball:
this move is instant, hits on the first frame and can not be thrown. its good using to whiff to get in and throw or crossup, etc. since this move is fast and instant, its great to stop tick throws with and to punish whiffed moves. however, most characters can attack him back when its blocked, and a handful of characters can even hit him back even when it connects.
like the blanka ball, its also instant, making it one of the fastest anti airs in the game. despite it having low invincibility (about a frame or two), it still has relatively high priority
its pretty good as a last minute clutch anti air if you dont have the balls charged up or the right angle for his normals anti air to connect. also its pretty good after a knockdown into whiffed ball crossup (or not). dont over use it, use it sparingly, but remember this move exists
jungle hop (forward):
this move is pretty fast and sorta hard to react to. it goes over some normal moves but there is some slight recovery in the end where you can get thrown or punched. fortunately, blanka has one of the best throw ranges in the game, and possibly the best throw in the game, so its pretty hard to counter throw them unless your opponent is fishing for this attack. like cammy's hooligan combo, the last thing you want to do is be predictable with this move. learn the range where he stops and lands so you wont hop right into your opponents arms.
jungle hop (backwards):
mainly, its used to build meter and making your opponent whiff an attack so you can retaliate with your normals or specials.
ground shave super:
this super is pretty bad but still has its uses seeing how he builds meter so fast. for opponents that cant react to it (especially midscreen or closer), its a good way to close the match via chip damage. also its a decent anti air for the first or two hits (rest will whiff) due to its invincibility. keep in mind it goes under most thin fireballs. also beware that its fairly punishable when blocked.
ssf4ae tier list regarding Gen:
D Proto: and where is Gen?
oORYUOo: you cannot tier what you cannot see