So the game is what 240 stars then to complete all instead of 120?

Are you complaining that the game is too long?

Haven't played Kirby, so I can't comment on that situation, though isn't that more for completion sake only, or does finishing Kirby on Ex-Mode give you a different ending? 

There's a lot of games in which you go through the main storyline and then unlock a harder mode or a more complete mode for the next playthrough. The main perps of this are JRPG's themselves. Games like Chrono Trigger, Parasite Eve and many others make you go through the main story once and then replay the game again in a higher difficulty or with more unlockables which gives you the "true" ending or a series of different endings. It's not necessary to do it, only if you're doing it for completion sake and at the same time, it doesn't invalidate the first playthrough that you did, even knowing that there's more to see if you complete the game further. 

For example, in the case of Super Mario Land 3D, the implementation of Luigi was poorly done, especially because it doesn't change anything in the game, unlike in the galaxy games, where the galaxies changed and some layouts were modified. On SML3D nothing happens, it's the same level as Mario which just ends up being filler content. Beating it as Luigi is only for completion sake, if you wish to get a full 5 star name file, but you can see the ending or the full game just by doing the game as Mario, both the normal worlds and the special worlds.

In the end, I believe you do have a point when you say that in some cases the lack of having a choice between having both difficulties modes (or any kind of unlockable) is bad when those unlockables are pretty moot once you do them in game, but it's mostly a game to game case. 

Because Nintendo is old school gaming. The reward is simply by allowing you to play again in a harder situation. Been like that since their beginning. Nothing wrong with it. I'd rather get a modified version of the game where its almost like a new game for free than some silly imaginary trophy or score. I don't need a larger e-penis, mine is fucking gigantic already.

I'm fully in agreement. I have no problem with being given hard mode, but give me something extra to go with it! Let me have another character or two that operate significantly differently, so I can have a whole new experience while I play this hard mode!

Can you do some editing to your post to fix the thread. Look at it in the html to see what you f'd.

I actually like unlocking harder difficulties, it feels sort of rewarding for me.
I remember finishing DMC 3 on normal... and unlocked hard, then finishing it on hard to unlock Dante Must Die and finish that to unlock Heaven or Hell. I had a lot of fun playing and re-playing the game over and over again from the beginning and the harder it got the more rewarding it felt... and you also unlocked other stuff appart from new difficulties like costumes, videos, screenshots and things like that.

God Hand was pretty cool with that too... I remember finishing normal and having some trouble to do it only to unlock Hard mode, which was like hell the first time, lol... I even thought I wasn't going to make it xD pretty awesome :D... too bad there wasn't anything harder than hard... so I had to re-play it with self imposed challenges to make it harder for myself :P.

I remember other games like Megaman Legends 1 and 2 i which you cleared it on normal to unlock hard and after finishing the hardest mode, you unlock Easy mode... it's cool and you feel overpowered but... I don't know, it isn't as rewarding as getting a harder difficulty.

I had no problem getting all weapons and stuff in that game over and over again, it didn't bother me.