Adding new tile animations to NSMB2 without custom code isn't possible, but you can edit existing animations.

In this tutorial I will use one of the standard tilesets as an example (this works with any retail tileset that has tile animations.

Open CoinKiller and right click on one of the standard tilesets in the tileset tab. Go to "Open in sarc editor" and a new window will open.



Select one of the ctpk files in the BG_tex folder and export it.



Here is a list of the ctpk files:

File name	Tile animation
block_gold.ctpk	Gold Block
block_hatena.ctpk	Question Block
block_renga.ctpk	Brick block
coin.ctpk	Coin
coin_blue.ctpk	Blue Coin
coin_red.ctpk	Red Coin
coin_tsuuka.ctpk	Hidden Coin/Dash Coin
tsuta.ctpk	Vine

Once you exported one of the ctpk files, open it in Kukkii and import a new tile animation.

Save the edited ctpk file and import it back into the tileset. Then you are done.



List of problems why the custom tile animation might not work or crash the game:

• Duplicating a tileset is going to break animations in the duplicate because the names don't match anymore.
  
• Renaming a tileset is going to break animations too.
  
• Importing a tile animation that has a different image size might cause problems.
  

Kukkii can be found here (Kukkii is a part of Kuriimu so download the latest release).