They are in UMK3 not in the normal MK3. And Raiden is only in MKT, the only Raiden that appears in MK3 and UMK3 is the Nightwolf Friendship Raiden.

and i just noticed ermac is not in mk1? this is vandalizm!!!

Ermac was just a glitch in MK1. That goes the same for the talked about Skarlett glitch in MK2 as well. However, they were all jokes and lies. ~ Hikari

Scarlett?? Never heard of it...

They all died.

Johnny Cage murdered them, and then killed himself.

Uhhh, I think he used sarcasm.

Skarlet. Like ErMac in MK1 She was a female ErMac in MK2, only instead of Scorpion it was a glitch rumored to happen when Kitana turned red. When Kitana's MKG alt costume came out as her wearing red it again raised suspicion of the rumor. ]{0MBAT made fun of it a little in one of his extras in Mortal Kombat Kamidogu 8.