Dude. Don't let this involve personal attacks, as that becomes very babyish itself, and gets really tiring to admins (I am not one, but I know that the arguing is annoying to them).
1.They are somewhat similar in having 120 collectables,and they both have a lot of common Super Mario Bros. Elements but I really doubt that they are sequels. Maybe they are close together, maybe they are sequels.
2.I'm not really sure about this one, I don't remember reading about anything like this, but Wii has a point that they nintendo wouldn't make a game 6 years later for a sequel.
3.Some Sequels aren't consecutive, look at MGS3. It is before all of the other Metal Gear games. Also, if they were like that. Mario Kart 64 would be the true sequel ...