Donkey kong mud picture
In a nintendo video that not many people have seen, in some mud somewhere a picture of 8-bit retro donkey kong is hidden somewhere in the mud!
Secret mode familiar boss
Louie(sorry for wrong spelling if its wrong) from pikmin2 is the 2nd last boss of secret mode (he challenges you to fruit bingo) his team (some old pikmin types come back here): 10 red pikmin 5 blue pikmin 9 white pikmin 16 wing pikmin. If you win you get 5 wing pikmin free and choco-loco fruit to take to the ship/teleporter you will get choco-milkshake from this dirnk.