Let's see where to starts.

Vfe - speed with flaps extended which is 215 kts
Vfo - speed while operating the flaps which is 200 kts.

You see back in my day when I started on the RJ 200 VFo did not exist. To drive the flaps you simply had to be at 215 kts. Then bombardier decided that to avoid the many flap fails on the 200 it was better on the flaps to slow to 200 kts to operate them. So in order to operate the flaps for 8 and 20 you need to be at 200 kts. Once they are down you can increase speed to 215. You only need to be at 200 kts while the flap are physically moving from 0 to 8 and from 8 to 20. Once they are no longer moving you can increase to 215 until you are ready to drop the from 20 to 30 and so on. There is no VFo for 30 and 45. It is the same speed as VFe.

Now Vb and Mb. These are turbulence penetration speeds. When experiencing turbulence these are the speeds to slow to to avoid having you wings ripped off.

Vadg- speeds with the air driven generator deployed (the **** has hit the fan) your adg provides emergency electrical power in case of a total electrical system failure. There are two types of ADG on the 200. Wet and dry. Wet is the older style and has to be operated at a slower speed. Dry is a newer style which can be operated all the way to Mmo.

Hope this helps.