I think the older I get (16 year old male, by the way), I seem to be drifting away from Mario, Zelda, Kirby, and even Sonic, although I still like those franchises. Other M and Fusion are my two favorite Metroid games, so don't criticize me for liking Other M. I have Wikitroid (http://metroid.wikia.com/wiki/Metroid_Wiki) at my disposal. I do not know of very many major links in the franchise, but my most fascinating is the link between Neo-Ridley from Metroid Fusion and Other M. Here is information from Neo-Ridley's Wikitroid page: http://metroid.wikia.com/wiki/Neo-Ridley "The presence of both an X-infected Ridley and Zebesian Space Pirates onboard the BSL station was considered enigmatic after Fusion's release, given that the Pirates were thoroughly routed and Ridley defeated in Super Metroid. The official Fusion web site indicated that the pirates were onboard the station on a marauding mission, which initially suggested they were not Federation-preserved specimens as has often been conjectured by fans. The events portrayed in the later-released Metroid: Other M, which chronologically takes place before Fusion, clarify this mystery: after Ridley's clone was killed by the Queen Metroid and became a dried, rotting corpse, the Galactic Federation intervened in the game's ending. When Samus returns to the Bottle Ship some time later, the corpse had vanished. The Federation would eventually send the Ridley clone's remains to the BSL station to be preserved.

Considerable evidence supports the conclusions made by Other M; for example, the Ridley clone's corpse in Other M is similar in color to the X-mimic in Fusion. Also, Ridley's clone would have been extremely fragile after being drained by the Queen Metroid, which certainly explains why the frozen corpse shatters when the Core-X leaves it. This theory is further supported by the presence of another specimen, codenamed Nightmare, aboard the BSL station; Nightmare was also originally encountered on the Bottle Ship and could easily have been transferred to the BSL in the same manner as the Ridley clone. The presence of Zebesian Space Pirates in both titles makes it unclear if the previously-mentioned marauding mission (likely to recover Ridley's corpse) was reckoned out of existence, as the cloned variants featured in Other M could have been transferred to the BSL as well. Samus Aran also believed that the Space Pirates were completely destroyed after the explosion of Zebes, making it a more likely explanation."

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TaySwift13 : I've got a theory that links Metroids, X, Phazon, and Phantoon...
Phantoon is a powerful multi-dimensional creature...Day and night, he oozes a powerful energy source called phazon. Since this energy is a part of Phantoon...he controls it and anything it comes in contact with. Ever notice that phantoon seems to have a form somewhat similar to the metroids? That would be because the metroids are created from Phazon. When the phazon is heated to a certain temperature...a metroid is born! Frozen Phazon results in the X parasites being created. the Metroids from phazon might even be provable...Remember Prime 1. Where was the metroid prime? Inside the phazon core...underground...where the magma is making the area extremely hot. Also, you may remember seeing the Metroids appear from the phazon. The X theory is a little harder to prove. Especially if you consider the fact that the X and Metroids are warring creatures. This could be due to the spiteful nature of Phantoon and even the phazon. The part that might give some validity to my theory is that the SA-X was not hurt by your ice missiles, it took the super hot plasma beam to stop her! These temperature opposites could be proof of the conditions of their creation. But are the X really created from the Phazon? How does that even relate? Think about the characteristics of the Phazon...a gelatenous substance with great capacity for taking over living things. The X seem to be gelatenous blobs that have the ability to rapidly reproduce and mimic any host...even going as far as retaining all the memories of the host. Seems a little close, if you ask me. It's not proof by any means...but it's something to think about. Okay, what makes me think that the phazon came from phantoon? The phazon tends to be a light blue color...the same color as the eyeflames that phantoon shoots at you. If the phazon was created by something...it would seem to me that something would have a purpose, and also a lot of power. Perhaps phantoon isn't really an alien ghost after all...Maybe he is more like some sort of creature that has its tentacles into a lot of things. Perhaps Phantoon has an obsession with power and energy. That could be a good reason he keeps hanging around all those abandoned ships--why the metroids seem to be able to drain the living energy out of you without ever drawing a drop of blood--why the X seek more form, more power, more knowledge. Perhaps that is why the phazon seems to be an ever growing-spreading-consuming power...Perhaps this is why the planet of Phazee seemed alive... The Metroid Prime took Samus' Corrupted suit and used it to transform into her...sort of like the X. And one more thing...Ever notice that in the last few moments before it died, the Metroid Prime (the first one) ends up transforming into something quite similar to an X? How did that happen?

FaithFighter : ...Wow. Just wow. That is amazing. After reading that, I am completely speechless...