The glowy ones, if I'm right, are special energypawns that have special texture. I don't think they can be summoned as they must be customized.
The Nali Ghost is a customized Nali as well. You can't summon them.
The Ice Skaarj Berserker is a Skaarj berserker with an IceSkaarj mesh. It's customized as well.
The bots can be added by the "Addbots X" command or with "Summon unrealshare.femaleonebot", same with femaletwobot, maleonebot, maletwobot, malethreebot, "summon unreali.skaarjplayerbot" gives you a Skaarj bot.
For the summoning codes, open UnrealEd, go to the Actor Browser and look at Pawns or Inventory, click on something you want to spwan and at the top you will see their code. At least in UEd 2.