1. This isn't really the place to ask. This is the ROLEPLAY section of the community, this is completely unrelated. 2. A thread doesn't really need to be made for this. Idk where to find a QnA thing, but this is the closest I could find. 3. There is actually a guide on that here to help you unlock ALL the currently playable robots. This didn't need to be asked to begin with, you can just read the helpful guide.
To sum it all up, this thread doesn't need to exist. Thank you and have a great time playing MMRPG and enjoying the community.