Stage: 25m

Perhaps the most famous first stage in video game history, 25m is something anyone can tell you what game it's from. We already have the 75m, so why not add the more famous stage to Smash as well?

Assist Trophy: Donkey Kong Jr.

Donkey Kong's son, who has starred in several arcade and NES games, I think just needs a little more time to build up his resume to be a character. For now, he could slam his key at you. I personally would like to see a new DK Jr. game for the 3DS.

Donkey Kong Enemies

There's not much to work around Donkey Kong series-wise for enemies, but there should still be some representation. Primarily, there should be several variations of  Kremlings.

Animal Friends

 Why not make a variation of the pokeball for Donkey Kong? The difference of a pokeball versus an animal crate is that you would have the option of using them. They would just sit there until you rode them. If you were to choose to ride them, then they would not react to damage given to you, as,if you were being hit by Fox's blaster. When riding them, each would have their "special ability" such as Squitter's ability to shoot spider webs. They could run away after receving enough damage.