So, as you may have guessed, the 3DS version of Generations is short, and for the missions, you gotta plunk down all your PlayCoins for most of them and all that, right? Well, turns out the Online mode is another way of doing that, AND getting other bonuses! I snooped around some places (mainly message boards), and apparently...
- The rather blatant "DENIED" sound of the L button is actually used for something; if you meet up with someone via StreetPass, or play an online match (not sure of what you need to do in it), you get a bonus monitor item you can use when you like, similar to some Mario titles (World, NSMB, 3D Land), only it activates immedietly. I'm pretty sure you can't use it online, but its still kind of a neat feature.
- Playing games online gives you points and unlocks more missions! So if you can't get enough PlayCoins, just try the online play. But don't fret if someone ragequits; the game considers you the winner by default, and still gives you points while taking away theirs! And even if you lose, you still get some points.
- You can see other players cards, and their Miis enter your Mii Plaza, apparently. Some people have reported playing multiple matches only to get a few Miis, however, so I'm not too sure on the specifics about this. In general, it seems the Online multiplayer can be used as a substitute for finding people to StreetPass with.
So... the main edge this game has over the HD counterpart is the multiplayer. I guess this is where the effort went, huh?
Also, I can't say for sure, but apparently Fat Sonic actually has BETTER physics than his HD counterpart! He actually accelerates down slopes when rolling and everything! Sadly, the level design in Generations 3D is not as great as the HD version, so... Damn. Maybe because Dimps did this, they'll try to fix up Sonic 4: Episode 2 with the better physics? I doubt it, but hey, one can dream...