Same size as a MAX 8 with an extra exit door. The name MAX 200 comes from the fact it can technically hold 200 passengers. Ryanair as of now (along with subsidiaries Malta Air and Buzz) is the only operator of the type (Ryanair’s hold 197 people). VietJet also has some on order, but I read they may be cancelled. From the outside, it looks the same as a MAX 8 but with an extra door like the 737-900ER/MAX 9 has.
The official name I believe is just 737 MAX 200, but airlines and Boeing have called it everything from 737-8200 to 737-8-200. Here’s a pic, you can see the extra door
I like the Allegiant livery on the MAX, would love to see this in IF.
Unfortunately I have no votes left, I’ll clear some when the ERJ update drops.
But I recommend to vote for your own request, it will look like you support your feature totally.