Nack's got some major sfere* to be talking to Ridley like that. He could friggin' eat Nack whole!
*Sfere - Italian for balls.
oh oh oh! thats the original Ridley, infected by the X but still himself for now, promised a cure by Nack. Thats the only thing I can think of that give's Ridley any motivation besides "assimilate, gain form, gain knowledge, gain power"
Actually, when the X infect a sentient creature they TOO become sentient, which allows them to expand upon their motivations to include schemeing, planning, plotting, and anything else they need to achieve their ultimate goals.
It could also be that the actual Ridley was never infected anyway to begin with. I'm sure there were old tonails or something on the ship that the X could have coppied the DNA of. Or maybe a reserve Ridley in some sort of cloning thing, just incase the active one gets killed again.
Actually, in Metroid: Fusion, the X there infect Ridley and create a Ridley-X. Also, the only SA-X ever were all eliminated at the end of Metroid: Fusion. The only way the Space Pirates could have even one, let alone the hundreds they seemed to have, is if the X can transmit genetic data on forms they have acquired from anywhere to any other X in existence (as in, a hive mind similar to that of the buggers of "Ender's Game").
They could also conceivably survive by jumping off the ship and floating in orbit. The planet's explosion would have rocketed them to the far reaches of the galaxy.
Wait wait WAIT what the HECK happend to the baby?...Did ridley just swallow her?...Or is he still keeping her in his mouth and gonna make her his apprentice or something?