Quote Originally Posted by Tvtyrant View Post
DBZ: Goten and Kid Trunks reached super saiyan early due to the latent presence of Majin energy on the planet.

Final Fantasy: All of the games take place on different planets in the same solar system, and the events ripple into each other. Kefka's disruption of his planet led to the events in FF7, drawing Jenova's attention but then when magic disappeared it redirected to a nearby planet.
If you believe The After Years (don't) all the pre-PS1 games are related to each other by having the crystals seeded by an all-powerful 'Creator' that you beat up at the end. But don't. Seriously The After Years is bad.