There are multiple AI only versions of characters, Sasuke is one. Which I find really confusing.

On the roof of Konoha Hospital you fight Chuunin Exam Sasuke. This version of Sasuke doesn't appear anywhere else in the game as far as I can tell. It seems like a waste? It'd make more sense to me if that was two star Sasuke instead of Curse Seal, make Curse Seal 3*, and then make Sasuke his own character.

I just wish Sasuke caused paralysis to people who attacked him. Give his squishy self a purpose.

lol dude sasuke on trail 80 has 3 mystery's they will never release that plus how many times does it have to be said oasgames cant "change" anything the game is premaid.

there are multiple version of ninjas, like sasuke for example. the free one is the * tier, the playboy is the better version, and so for other sasukes that hasent been released. basically, you are requesting a new kind of sasuke. the free version will remain like that because it is intended to be the thrash version of sasuke, thats why its free.

I still find him very useful, though.

I wouldn't recommend posting suggestion about implementing new things to the game system or changing it since it's a complete and utter waste of time. Oasis can't do anything about it. only Tencent can ( the original company who made the game) . Unless you know Chinese, you can suggest them things, but I'm not promising that they will listen to it LOL ( unless the situation is like a commotion ).

where can i find Sasuke on top of the hospital roof?

During the weekend Chase Missions if he happen to the one of the Chase Ninjas that you're offered and you've selected.