Pokemon who don't evolve in emerald version are: Luvdisc, lunatone, solrock, spinda, rayquaza, groudon, kyogre, jirachi, deoxys, regirock, regice, registeel, trophius, kecleon, nosepass, mawile.
382
a little over 200
There are many Pokemon you catch that are similar in sapphire and emerald but there are many Pokemon emerald can only get and not sapphire.
385 Pokemon.
Pokemon Emerald has a bunch of Pokemon, that are available to be caught! It's too many to list here.
Alot
4.
420
You'll have to trade it from another version. It is available in Pokemon Emerald at the Desert Underpass (Near Fallarbor), and many places in versions Fire Red and Leaf Green.
Emerl? If you mean Emerald, there is 387 that you can get by trading (complete the data for every single Pokemon exept sinnoh Pokemon) but idk how many just for emerald.
8.
8