These would be the tasks for a full completion of the game:
- Unlock all 36 Costumes
- Collect 15 Friendly Tokens
- Beat all 128 missions in both multi- and singleplayer
I'm not there yet, but made some significant milestones last day. I finally completed all 128 missions in multiplayer and I got all costumes except for the Dapper Spinner Kit, where you need ten Freebies. I'm not messing with the clock of my 3DS and I only have to get three more, so it's just a matter of a short time.
I collected 9 Friendly Tokens so far, which was possible thanks to my collection of Zelda themed Limited Edition Nintendo 3DS systems. I knew that they would come in handy with this game! You have to keep formatting a system, but this only takes a few minutes. I could collect the rest of the tokens just now, but later this year I will be at a Zelda fan meeting, where I will probably get the rest. It's not like you get anything important for having all 15 tokens, just some changes in dialog. By the way, with these Friendly Tokens this game has actual missables, because you can sell them. Sell more than 7 and you won't be able to get all costumes. They might fix this with an update, but just don't sell them. You shouldn't sell any materials at all to be honest, because the prizes are not worth it.
Anyway, one big task left would be completing all missions a second time in singleplayer. The board on the wall in the lobby keeps track individually what missions you've beaten in multiplayer and in singleplayer. With multiplayer I got the full board, now I still will have to go through all of it again in singleplayer. I don't mind this too much though, because it offers quite a different experience. And it's not as bad as I thought it would be, I already managed to beat all challenges in the Forest, even the first Time Trial, which seems to be the hardest in the game. Still, I'm hoping that Nintendo might improve the singleplayer in one of their updates for the game... real simple changes could make the experience much more pleasant. I especially miss the possibility to equip the doppels with outfits, it would be so awesome being able to create your perfect team.
On a site note, I also got a boxed copy of the game on Friday, which I have abused for farming materials in the arena. However, it didn't do me anything good, because it turned out that the materials, which I really wanted, are not available in the arena mode. There's like one rare material in each area, which you can only get as a rare prize in three later challenges. So, they are easy to miss. Mystery Jade, Rainbow Coral, Star Fragment, Ice Rose, Vibrant Brooch, Crystal Skull, Sanctuary Mask, Steel Mask - these are the ones. So, keep an eye out for them at the merchant. If he offers them, do not hesitate to buy them!