Games for long trips

So to get to Germany next week i'll be getting a train, and then a plane. So i'll need something to occupy my time with. I'll be bringing my 3DS, DS and PSP so if any of you know any great games i could bring with me then please let me know. I'm already thinking of replaying The World Ends With You, but i haven't touched my DS in ages so haven't got any up to date games on there.

The World Ends With You

This is by far my favourite game for the Nintendo DS. If i could recommend any game that is a must play to you, it's got to be this. The story, music, game play and everything about it is just so spectacular and brilliant, I can't even remember how many times I've played this.

Kirby Mass Attack

This game was briefly shown at the end of Nintendo's E3 conference, well when i say briefly i mean the logo appeared at the very end, it was hardly noticeable, but still it was there.

This game concentrates on not one, but a whole bunch of small Kirbys, the more the merrier right? Well according to Nintendo, yes. So during this game instead of controlling just the one pink bundle you can lead a horde around, pummeling enemies, and
wreaking havoc on any vegetables that are in sight.